British Museum blog

Piecing together the Chiseldon cauldrons puzzle

Alexandra Baldwin, British Museum

Alexandra Baldwin working on one of the Chiseldon cauldrons

As is often the case, the painstaking process of excavating the cauldron I’m working on has been more complex and time consuming than we initially thought.

The majority of the cauldron was lifted from its findspot in a block of soil supported by plaster bandages. Hundreds of smaller fragments were also removed from around the object during excavation. The fragmentary state of this cauldron is partially due to the fact that it was buried upside down, and over time the weight and the pressure of the overlying soil crushed and distorted it.

I began by carefully cutting away thin strips of plaster to reveal the top of the block and clear soil from the metal. With heavy clay soil, which is more solid than the objects, this has to be done with great care using scalpels and leaf trowels to remove soil dampened with water and alcohol.

One of the Chiseldon cauldrons before being unwrapped

Working down in layers, the sheet metal is uncovered, and the true condition of the object revealed. It is highly fragmentary and even undisturbed areas are in pieces.

Fragments loose in the soil have to be rejoined back onto larger sections immediately otherwise their location will be lost. This is done using thin tabs of nylon gossamer, a thin random weave of synthetic fibres, adhered over the join.

Removing the plaster support and soil from around the object makes it very unstable and because of this you are unable to see the entire object at once; the metal is so thin and fragile that it is unable to support its own weight.

I have now laid out the fragments from the excavation on a large table and have been looking for joins between them, and also between the fragments and metal contained in the soil block. Although I have found a number of joins there have been disappointingly few.

Fragments of one of the Chiseldon cauldrons

Very quickly it became apparent that there was something strange about this cauldron – there seemed to be too much copper alloy – several folded layers in the block as well as large sheet fragments.

From knowledge of other cauldrons we can tell that they are made in sections riveted together; the iron rim supporting the handles, then below this, two sections of copper alloy bowl. As I began to reveal more it appeared that there were two bases on top of each other – was this two cauldrons one inside another? Or were we looking at areas of a separate cauldron either displaced during burial or placed into the pit in fragments?

As each layer is revealed the position of the fragments is carefully recorded. Stephen Crummy, one of the Museum’s illustrators, has been using 3D laser scanning and photogrametery to map the block.

The next stage will be to try and decipher and interpret the remains. Then, after supporting and stabilising them, we will remove sections of the metal, effectively disassembling the object from around the soil.

The Chiseldon cauldrons research project is supported by the Leverhulme Trust

Find out more about this research project

If you would like to leave a comment click on the title

Filed under: Archaeology, Chiseldon cauldrons, Conservation, , , ,

2 Responses - Comments are closed.

  1. Ken Ormsby says:

    Saw the section on your work with the cauldrons on Digging for Britain. Fascinating, keep it up, can’t wait to see the final conclusions and reconstructions etc.

    Like

  2. Cassy Cutulle, UCL says:

    Very intriguing, can’t wait to see the publication! Thank you very much for the lecture and the tour of the labs today, Alexandra!

    Like

Enter your email address to follow this blog and receive notifications of new posts by email.

Join 11,878 other followers

Categories

Follow @britishmuseum on Twitter

British Museum on Instagram

On #StDavidsDay, here’s an allegorical representation of Wales from 1798
#Wales #art #history #March is named after Mars, the Roman god of war. Here’s an engraving from 1698 of him sitting on a cloud.
#art #history #months #print #engraving #Mars Born #onthisday in 1820: Sir John Tenniel, who illustrated the first edition of Lewis Carroll's Alice's Adventures in Wonderland in 1865. Here's Alice and the Cheshire Cat
#books #history #illustration Every ‪#‎PayDay we're sharing a ‪#‎MoneyFact!
The first coin issued with the dollar denomination was not in the USA, but in West Africa by the British Sierra Leone company in 1791.
You can explore the history of money around the world in the Citi Money Gallery (Room 68): britishmuseum.org/money
#history #money #coins #coin #fact ‪#‎DefiningBeauty opens in one month! Look out for our highlight #FridayFigure each week. 
The exhibition brings these three sculptures together for the first time, creating new narratives.
These sculptures show the work of three of the greatest artists in ancient Greece: Phidias, Myron and Polyclitus. Myron’s discobolus (disc-thrower) is the perfect balance of opposites and Polyclitus' doryphoros (spear-bearer) is constructed on a precise set of ratios. In contrast, Ilissos is carved from life rather than arithmetically calculated. Discover more on tumblr: britishmuseum.tumblr.com
#exhibition #behindthescenes #installation #art #sculpture You can now explore #AfricanRockArt from #Chad with new images available online at www.britishmuseum.org/africanrockart 
Chad has thousands of rock art engravings and paintings, some up to 7,000 years old! 
Throughout the caves, canyons and shelters of the Ennedi Plateau in Chad, thousands of images have been painted and engraved, comprising one of the biggest collections of rock art in the Sahara. A series of engravings at Niola Doa of groups of life-sized human figures have become especially renowned for their singularity and quality.
#art #rockart #Africa #Chad #engraving #painting
Follow

Get every new post delivered to your Inbox.

Join 11,878 other followers

%d bloggers like this: