April’s News from the Conservation Lab: El Kurru 2018 Season Retrospective

BY SUZANNE DAVIS, Curator of Conservation

Last month, I returned from fieldwork at El Kurru, the Kelsey’s excavation project in Sudan. It was a good season overall, but also a bit odd. It felt to me like a season where almost nothing worked out the way we’d planned. For example, the conservation worklist included stabilization of cracked columns in the funerary temple with a lime-based mortar. I’ve done work like this on many other projects and expected it to go smoothly, but it didn’t. Amaris Sturm — conservation intern this year at El Kurru, and a National Endowment for the Humanities Fellow in conservation at the Winterthur/University of Delaware Program in Art Conservation — ended up testing twenty-six (!) different grout mixtures before hitting on one we were happy with. For other team members, equipment was delayed or couldn’t get through customs, supplies didn’t arrive, and work plans had to be altered mid-season.

In retrospect, it was a season of significant progress on multiple fronts, but at the time … at the time, I often felt like nothing was working and it was seriously frustrating. When I think about it now, my time onsite this year was a small lesson in persistence and a demonstration of the power of kaizen. This philosophy (which originated in the U.S. but became popular in Japan following WWII) advocates continuous improvement by making small changes or taking small steps. In Arabic, people often say, “shwaya-shwaya” to mean, “a little bit,” or “little-by-little.” For me, it was a shwaya-shwaya season, and in the end we accomplished most of what we’d set out to do.

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Amaris Sturm at work in the El Kurru funerary temple. Photo by Suzanne Davis.

 

The El Kurru heritage project

BY SUZANNE DAVIS, Curator of Conservation

For the past several years, I’ve spent part of the winter in the small Sudanese village of El Kurru, and every year I fall a little bit more in love with it. I work there with Kelsey Research Scientist (and Kurru dig director) Geoff Emberling on the excavation and preservation of an ancient royal cemetery. Two years ago, the Kurru project team began to deliberately focus on community engagement as a way to forge stronger links between the local community and the ancient site.

This work has evolved slowly, beginning from plans to present the site to tourists (of which there are a surprisingly large number). El Kurru is an interesting site, with a big pyramid, two beautifully painted subterranean tombs, and a large rock-cut temple. But the site is only a small part of what I love about El Kurru. I love the Sudanese friends and colleagues we have there, the beauty of the Nile, and the family we live with. Tourists to the site, sadly, enter from a desert road and never have a reason to visit the town. As we planned the site itinerary for tourists, we kept saying to ourselves — wouldn’t it be great if visitors could keep walking and go into town, down through the date palm groves, and see the Nile? What if they could drink some Sudanese coffee, hear some music, and eat Sudanese food?

Over the past two years, we’ve worked with University of Michigan colleagues to assemble focus-groups in El Kurru to explore this idea. Not only did village residents think it was good idea — an exciting idea, even — to showcase local culture, they had a clear vision for what visitors should learn about their village and what experiences make El Kurru special. Here are photos of a few.

Mohammed Ahmed Al-Makee, who is in his nineties, is one of El Kurru’s last traditional weavers. His wife dyes and spins cotton into yarn, and from this he weaves scarves, shawls, and bed coverings on a pit-loom in the courtyard of his house. He allowed my colleague Jack Cheng and I to talk with him about his work and to record the sights and sounds of his loom, which he inherited from his grandfather.

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Once or twice a during the field season, we are treated to a riverside concert of traditional music. There is singing and dancing, and the primary instrument is the tambour, a stringed guitar-like instrument. These instruments are made in the village and are often decorated by the town’s henna artist. In this group, the musician I know best is Abdel Bakee, the drummer.
3_Baker
Bread is the backbone of every meal in El Kurru. There are several popular kinds of bread in Sudan, but the one shown here is a pita-type bread made from wheat flour. It is baked fresh every day in multiple village bakeries and is especially delicious right out of the oven. The baker pictured here is Ahmed Ibrahim.
4_Palm groves
El Kurru is an agricultural village focused on date farming. The date palms grow in beautiful gardens along the Nile. Families own a plot of land and work together to irrigate it, care for the trees, and harvest the dates, of which there are many kinds. From the house where we live, we can walk across the street and through this section of trees to get to the Nile. It is about a five-minute walk to the river.

RTI at Kurru!

JANELLE BATKIN-HALL, Graduate Intern in Conservation

I’ve just returned from a fantastic six-week fieldwork experience at the El Kurru archaeological site in North Sudan. There, Kelsey conservator Suzanne Davis and I documented ancient figural and geometric graffiti in a funerary temple at the site. Each day, Suzanne and I would make our way through a maze of mudbrick alleys to the edge of the village, where the funerary temple and several royal burial tombs and pyramids are located in the desert.

We photographed  the graffiti using a process called reflectance transformation imaging (RTI) (fig. 1). RTI is an excellent technique for documentation because each pixel records surface texture in addition to color. Since sandstone is subject to ongoing disintegration and loss, the resulting RTI images provide an excellent record of the graffiti’s current condition, as well as a highly detailed image of the column’s surface texture.

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Figure 1. Conservators Suzanne Davis (left) and Janelle Batkin-Hall performing RTI imaging at El Kurru. (photo by Walter de Winter)

The Kurru graffiti were documented using highlight image capture where the camera remains fixed and a portable flash is moved at intervals which create a dome of light over the surface.  In a single photo sequence of one object (or in this case, graffito), approximately 48 digital images are taken. Two reflective black spheres are also fixed within the image frame, and the reflection of the flash on these spheres allows the processing software to calculate the light direction for each image. The resulting images are combined with software, resulting in a single file. In this file, the viewer can move the light source across the surface in order to examine the surface details and topography from any angle (fig. 2).  As a result of using this technique, 64 “new” ancient graffiti were positively identified and additional surface details became visible. In a couple of instances, a graffito was initially misidentified. For example, in 2015 a particular graffito was identified as an arrow. After performing RTI, it was clearly a human figure.

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Figure 2. Screen capture of bull graffito using CHI’s RTIViewer software.

For me, this was a great experience because I was able to use a technique I recently learned in graduate school. Being able to apply it onsite and share the results with our colleagues was very rewarding.

 

From the Archives — January 2016

BY SEBASTIÁN ENCINA, Museum Collections Manager, Kelsey Museum of Archaeology

Happy New Year, readers. The Kelsey Museum is back in the swing of business, and we are already in the midst of the semester, working with students, classes, and upcoming exhibitions. As it is the Winter term, some people begin planning for fieldwork and being overseas. Some Kelsey staff will be leaving for the field in just a matter of days, while others will wait until May/June/July to be at their respective projects.

For those who have never been on an archaeological dig, you are missing out! There is so much to learn, to experience. Being overseas, especially, affords a person the opportunity to interact with different people, eat different foods, and lead life at a different pace. There is also the opportunity to travel, see the sites a country has to offer. And there is, of course, the actual archaeology, what there is to discover that gives us a better understanding of the past. It truly is a magical experience.

But it’s not all fun and adventures. Sometimes being overseas brings with it some hindrances and annoyances that add up to interesting stories, but not exactly a great experience. For those not used to travel, new water and new foods will have an adverse effect on digestive system. Dealing with customs and authorities might be an issue. Many people will miss their family and friends, and the comforts of home.

In other cases, the environment is pestering, quite literally. Working as an archaeologist, one will find themselves outside often. Sun, wind, occasional rain, heat and cold all contribute to grueling days. And in many areas of the world, the flora and fauna of the region pose risks to health and work. Wild animals and overgrown plants get in the way, not caring for the work one is pursuing. Some, like the mosquito, will carry diseases one has to be wary of.

This is a problem that affects the modern archaeologist, but it is not a new dilemma. The papers of Qasr al-Hayr, an excavation headed by Oleg Grabar in the 1960s and 1970s, show how the simple fly was proving to be a nuisance even back then. Professor Grabar reached out to colleagues and experts for resources or suggestions for ways to handle the fly problem. In this month’s “From the Archives,” we see a response from a colleague at the Freer Gallery of Art, along with a pamphlet discussing the household fly from the US Department of Agriculture. The pamphlet makes recommendations, such as traps, screens, insecticides. However, the letter expands on this, noting that the region is rife with flies, and trying to tackle the situation would demand many more resources than realistically available, and any efforts would be lost as flies from surrounding regions would just fill the vacuum created.

QasralHayrFlyLetter001

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Letter from Qasr al Hayr archives on fly problem in Syria
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Pamphlet from the Qasr al-Hayr archives on the fly problem in Syria.

Qasr al-Hayr was a medieval Islamic town found between the Euphrates and Damascus. By its placement at the foot of one of the few mountain passes in the central Syrian desert, it commanded a commercial and strategic position of importance between settled and nomadic groups. Those of us who have worked in that area of the world know how prevalent flies are, and any efforts to lessen their numbers seem to be fruitless. They are a constant presence.

Being out in the field is truly a great experience, one many students, staff, and professors look forward to every year. But it comes with a price. Sometimes that price is large, other times it is small, but even those small problems have ways to multiply and cause big headaches.

Identifying pottery in the field: Sad Handle Ware at Omrit

BY CAITLIN CLERKIN, PhD student in the Interdepartmental Program in Classical Art and Archaeology, University of Michigan

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Pottery reading in the Omrit registry.

One step in studying pottery involves identifying what archaeologists call wares. The term “ware” refers to a particular way of preparing the fabric (the material that makes up the vessel: clay, natural mineral inclusions, added temper) to create a specific range of shapes or forms. This kind of grouping is defined by a combination of characteristics of production process, material, and shape/appearance. (See here for another definition of ware, and other terms associated with studying ceramics.)

I spent the first three weeks of June studying excavated pottery at the Omrit Settlement Excavation Project. Omrit is a site in northern Israel’s Upper Galilee, set at the foothills of the Hermon Range; it is the location of a Roman temple and a late Roman settlement (on which the current excavation focuses). I work with one of the project directors, Dr. Jennifer Gates-Foster (UM/IPCAA alumna!), of UNC-Chapel Hill, on the excavated pottery: as part of our work, we sort, identify, and record the different wares we find in each excavated unit (as well as a range of other data about the pottery). This means both identifying known wares and keeping an eye out for shared characteristics amongst sherds of unknown fabric or wares. Sometimes, with enough reoccurrence, these groups of unidentified sherds become identifiable as a new ware; sometimes, we add to what we know about previously identified wares when we spot new shapes or characteristics.

At Omrit, we aim for total recovery of cultural materials. To this end, the excavators sift all excavated dirt (pouring it through 1/4-inch mesh screens). The resulting volume of pottery is large (I don’t yet have final tally for 2015, but, in the 2014 season, we “read”—sorted, analyzed, and recorded—48,678 sherds, and 848.33 kg of pottery, plus part of a backlog from 2013), which is absolutely wonderful for the data set but can sometimes lead to what I call “sherd shock.” While in the midst of a sherd shock fit this season, I came across this diagnostic sherd:

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Sad Handle Ware?

“Diagnostics” are what we call rims, bases, and handles of ceramic vessels: examination of these pieces can usually help us identify what the larger vessel shape or type was. Given a reasonably sized piece of a rim, ceramics specialists can usually identify the sherd as coming from a bowl rather than a jar. Additionally, rim shape can tell us what kind of a bowl a given sherd once belonged to. For example, the photo below shows, from a single context, 32 rims of a single type of bowl (with a very distinctive rim) called a “Banias bowl,” named for a nearby site where the bowl type was first identified. (I call this quantity a Banias Bowl Bonanza.) Having a small portion of each rim (as seen in the photo) is enough to identify the type of bowl.

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A Banias bowl bonanza!

Anyway, back to that funny diagnostic sherd (in the photo with the pink 5-cm scale): that sherd is a vessel handle. But what kind was it? It seemed very strange, and it was not a handle shape that was familiar to me from published literature on the region.

Through consultation with other archaeologists at Omrit, such as field director Dr. Ben Rubin of Williams College (also a UM/IPCAA alumnus!), we determined that, while the handle looked oddly like a finger, a more appropriate name for the group to which this strange, unknown handle belonged would be “Sad Handle Ware” (because it was the saddest looking handle we had ever seen).

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Not Sad Handle Ware → Hawarit Ware!

Closer examination of the handle’s fabric and surface treatment ultimately allowed me to identify it as Hawarit Ware, a cooking ware produced at a kiln (at modern Khirbat el-Hawarit) just up the slopes of Mt. Hermon from Omrit. Hawarit Ware is our main cooking ware at late Roman Omrit and is the group to which most of our cooking pots, casserole pots, and many other vessels belong. This shape was unfamiliar, but everything else about it matched Hawarit Ware. So much for a new ware! (Alas, I will never be famous for identifying Sad Handle Ware … because it is not a Thing.) This funny little handle, however, was a reminder that we sometimes come across new vessel shapes in known wares — and that our examination of pottery at Omrit will do more than just tell us about activity, consumption, and chronology at Omrit; it will also feed back into the pool of knowledge about ceramics in the region, adding to what is known about local and regional ceramics for ceramic specialists after us.

Mt. Lykaion Excavation and Survey Project study season

BY DAN DIFFENDALE, PhD student, Interdepartmental Program in Classical Art and Archaeology, University of Michigan

Mt. Mainalon
Mt. Mainalon above the village of Kardara.

I spent the first three weeks of June in Greece, working with the Mt. Lykaion Excavation and Survey Project. Although the project last conducted fieldwork at the Sanctuary of Zeus Lykaios on Mt. Lykaion in western Arcadia in 2010, we have been busy every summer since then studying the excavated materials. In excavation years, we rent private houses in a village close to the site; during study seasons, we stay in an off-season ski resort in eastern Arcadia, in order to be close to Tripoli, where the artifacts are housed. From Kardara it’s a thirty-minute van ride to our apotheke, or storeroom, where we study the materials almost every day (but never on Sunday). The study seasons witness a wide range of scholars and specialists coming and going as their schedules permit; among others, we have experts in animal bones, roof tiles, coins, and numerous varieties of ancient pottery, including Neolithic, Early, Middle and Late Bronze Age, Iron Age, Classical, Hellenistic, and Roman. Of course, this study could not proceed without the heroic efforts of our registrar, who is responsible for the organization of the apotheke and all procedural matters relating to the artifacts, along with her team of assistants, who do whatever assisting needs to be done.

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At work in the apotheke.

This season I have been assisting one of the project’s directors in the study of the Late Bronze and Early Iron Age pottery, as well as preparing a final report on the stratigraphy of one of the project’s trenches on the peak of Mt. Lykaion. One of my goals this season has been looking for matches or “joins” between the tens of thousands of broken pieces of pottery from the trench. Although it is inherently satisfying to find such joins, a successful outcome is by no means guaranteed; it’s like playing a puzzle without a box-top picture to compare to, and with most, if not all, of the pieces missing. Despite the frequent frustration, it’s an important activity; knowing if there are pieces of the same pot scattered in different parts of the trench helps us to understand the formation processes of the site. If ancient people deposited a whole pot on the mountaintop, but we find broken pieces of it in different areas of our excavation, we deduce that it must have been broken and had its pieces scattered by one or more subsequent events. These events might be later human activity, animal disturbance, natural phenomena like earthquakes or frost heaves, or some combination of these. Given that the altar where we excavated has evidence for human activity spanning some three thousand years or more, from the Neolithic to the Hellenistic period, or from before 3000 BCE down to the 1st century BCE, followed by the two thousand years from then to now, it’s not surprising that things got so mixed around!

Mt. Lykaion Excavation and Survey Project website:
http://lykaionexcavation.org/

Mt. Lykaion preliminary reports:
http://www.jstor.org/stable/10.2972/hesperia.83.4.0569
http://www.jstor.org/stable/10.2972/hesperia.84.2.0207

Camping and Kanka Cola: Life at Labraunda

BY CHRISTINA DIFABIO, PhD student, Interdepartmental Program in Classical Art and Archaeology, University of Michigan

The BULP 2014 Team and the Monumental Fountain House, photo courtesy of Liam Dean-Johnson.
The BULP 2014 Team and the Monumental Fountain House, photo courtesy of Liam Dean-Johnson.

My fieldwork experience was crucial for my decision to apply to graduate school. During my junior year at Brown University, I had the opportunity to become involved in a new archaeological project directed by Prof. Felipe Rojas, who is at the Joukowsky Institute for Archaeology and the Ancient World at Brown. Since 2013, I have been part of the Brown University Labraunda Project (BULP). BULP is concerned with the rural sanctuary of Labraunda in ancient Caria, now modern southwestern Turkey, and is part of the greater Labraunda Archaeological Project directed by Dr. Olivier Henry.

In antiquity, Labraunda was a sanctuary dedicated to Zeus Labraundos, and people from cities to the north and south came to worship the local deity at an annual festival. The sanctuary is known for its monumentalization by local satraps under the Persian Empire in the mid-4th century BCE: Mausolos (most famous for his Mausoleum, a wonder of the ancient world, located in Halikarnassos, now modern Bodrum) and his brother Idrieus. The current objective of the project is to study a monumental fountain house that lies just outside of the sanctuary. Before our studies, the fountain was largely overlooked because it does not conform to traditional classical architecture, even though its importance is clear due to its position between the two entrance gates to the sanctuary. Our studies suggest that the fountain was built in the mid-4th century BCE and used in some capacity through the Christian period. It is the largest fountain house at Labraunda, and it would have provided rest and refreshment for visitors after a long journey.

I enjoy the intellectually stimulating (and physically tiring) research, but even more so I love learning and living in the Labraunda community. Multiple groups work at Labraunda at a time. In addition to our Brown team, I interact with Turkish, French, and Swedish scholars on site. During the week, we camp about a five-minute walk from site, so we do not have the same accommodations we would have if we were staying in a hotel in the closest town (i.e., we have limited electricity and two working toilets). When I tell this to people, they often describe it as “roughing it,” but with such great company and views of the mountains and stars, I can’t complain at all. I have also enjoyed working with local Turks in the trenches. Language is often a barrier, and I am on my way to learning Turkish. However, we often find things to chat about, mostly the weather (Bugün hava çok sıcak — Today the weather is very hot!), and we have fun as we work together. Some of the younger workers have affectionately dubbed our team members kankalar, similar to “bros” in English, and we have named our daily soda breaks “Kanka Cola.”

When I first heard about this project, I never could have imagined where it would lead me. Now as a first-year student in IPCAA, I plan to specialize in Western Anatolia and continue fieldwork in Turkey. The excavations of the monumental fountain house are almost complete, but I look forward to seeing where BULP’s future studies at Labraunda will go.