Blog: Archaeology: Portable Antiquities Scheme (PAS Cymru)

After wheeling the large block into the archaeological conservation laboratory, I began the task of removing the plaster bandages covering the top of the block.

This proved a simple and satisfying job- the bandages were easily torn off in layers, revealing the Clingfilm barrier underneath. In order to reinforce the sides of the block, yet more bandages were wetted and wrapped around it.

The next step in opening up the block was to peel back the Clingfilm. This had to be done very carefully, as I didn't want dust from the plaster covering the archaeological artefacts beneath. Pegs and bulldog clips were very useful in holding back the plastic layers neatly.

After much anticipation, the armour was revealed. As I had not been present during removal of the armour from the fort, this was the first time I was able to see the lorica, and I was very impressed by the corroded remains.

As I excavate the armour contained within this soil block, I have to document every individual feature, and the physical relationships between all the artefacts. This provides invaluable information for the archaeologists working on the project, who want to tell the story of Isca.

This documentation process involves taking many photographs and making copious notes day by day; before I even begin to excavate the block using small hand tools, I  drew a plan of the whole block, at a 1:2 scale. It was easiest to do this by laying string across the top of the block, and drawing it in sections.

After all this preparation, I cannot wait to get started excavating the soil overlying the armour and other artefacts- though this will take a very long time.

Archaeologists from University College London and Cardiff University have been excavating remains of Isca, the Second Augustan Legion’s permanent fortress, since 2007. The area excavated has centrered on a building in Priory Field, located in modern day Caerleon, South Wales.   

Excavations in summer 2010 focused on an area of a courtyard building, with evidence to suggest it was a warehouse. A room in this building revealed some very exciting finds: the apparent remains of Roman body armour, ‘lorica segmentata’.

Archaeologists spent days carefully exposing these rare finds, which seem to have been thrown haphazardly on the floor of the warehouse.

These fragile artefacts were then carefully removed by conservators from the National Museum of Wales. The exposed objects were wrapped in Clingfilm, to prevent them from being contaminated by the materials used to support them.

Plaster of Paris bandages, similar to those used in hospitals, were very useful for holding these soil blocks together, and preventing damage to the artefacts whilst in transit.

Once the plaster had set, the team undercut the plaster blocks: this was a tense moment, as the archaeologists did not want to cut through any material that they could not see.

Supporting the artefacts with robust materials meant that they could be driven back to the National Museum at Cathay’s park safely. There they will be re-opened and carefully micro-excavated in the conservation laboratory.

The largest of the blocks removed measures about a metre squared, and had to be carried into the museum by 6 men, given its weight.

Progress of the investigation of this block will be recorded here.

One of the most popular displays at the National Roman Legion Museum is a stone coffin that contains the skeleton of a Roman man. The coffin also contains the remains of grave goods that he would need for their next life, including the base of a shale bowl and fragments of a glass perfume or ointment bottle.

Step 17

Now we turn our attention to the coffin lid.

Like the base it was broken by the digger. Here it is with all the fragments lined up ready to be joined. Some areas are missing, but the gaps will allow people to see inside the coffin when it is put back on display.

Step 18

The top of the lid looks so uneven and eroded because acid rain soaked into the soil has dissolved the limestone. This process eventually leads to the formation of limestone caves in nature. Solution holes, the start of mini 'caves', can be seen in the lid.

Step 19

Adhesive alone may not be strong enough to keep the heavy fragments of stone together.

To help strengthen the bond, metal rods will be inserted across the join. Holes have to be drilled into the broken edges of the stone. This is a tense moment as any mistakes could cause further damage.

The stone could split or flake; we just don't know how it will react to the drilling!

Step 20

Thankfully all goes well and the drill makes light work of the task.

That pile of stone dust will also come in useful; we can mix it with the glue to help secure the rods.

Step 21

Another hole now has to be drilled in the edge of the adjoining fragment; this must match up perfectly to allow the rod to fit across the break.

First stage is to dab paint thickly around the freshly drilled hole.

Step 22

The fragment is then placed in position and pressure applied.

This has to be done quickly before the paint blobs dry, but also with care as we don't want paint smeared everywhere

Step 23

Success!

The paint has left a good imprint on the other fragment, so we know where to drill the second hole to fit the rod.

Step 24

The metal rods now have to be cut to the right length, about 7cm.

This was harder than we thought as the stainless steel is very tough. We had to stop several times as the blade kept heating up.

Only 6 more to go!

Step 25

With the metal rods in place within the join and epoxy glue applied, the two pieces are brought together.

Care is taken to align the edges before the two sections are held in place and the adhesive allowed to set.

Step 26

All stuck together now.

Hopefully the metal dowels will give the extra strength required, especially as we have to move the lid from the workshop in the basement to the gallery upstairs, where at last it can be reunited with its base.

Unfortunately we have no lift....any ideas!

Step 27

The only option is good old fashioned man power just like the Romans!

Here some of the team (our modern day Roman slaves) take a well deserved break after bringing one of the coffin lid fragments up the stairs.

Step 28

Before the lid is put in place the skeleton has to be laid out again. Being careful to get it right!

Unfortunately one item will be missing for a while and that's the skull. This is needed for analysis as we try and find out more about the man buried in the coffin 1800 years ago.

Step 29

Once everything is in place a new Perspex cover can be installed to support the stone fragments of the lid.

The Perspex is only 1cm thick so hopefully it will be robust enough to take the weight of the solid Bath stone blocks.

Step 30

Now the tricky task of installing the lid begins.

Thankfully all goes well and the Perspex proves strong enough to take the weight.

At last, 15 years since its discovery, the lid is once more back where it belongs, on top of the coffin.

Although the lid partially obscures the contents of the coffin, new lights will be installed to help illuminate the interior.

Step 31

The first phase of the redisplay is now complete, so in the second phase we turn our attention to the Skull.

Follow the blog as we attempt to learn more about the man buried in the coffin.

Where did he grow up and what did he look like?

One of the most popular displays at the National Roman Legion Museum is a stone coffin that contains the skeleton of a Roman man. The coffin also contains the remains of grave goods that he would need for their next life, including the base of a shale bowl and fragments of a glass perfume or ointment bottle.

The coffin was found in 1995 on the site of a Roman cemetery just outside Caerleon. The cemetery is now part of the Caerleon Campus in the University of Wales, Newport. It has been on display in the National Roman Legion Museum from 2002, however in Summer 2010 we started working to redisplay the coffin in a fashion that is closer to its original form thanks to funding from the Friends of Amgueddfa Cymru – National Museum Wales.

Made from a solid block of Bath stone, the coffin dates to about 200AD. Since it is around 1800 years old the coffin wouldn’t be able to support the weight of its original lid which is in 2 large pieces. The sides and base of the coffin are being reinforced and the lid will sit on top of a Perspex cover with enough of a gap so that you can see the skeleton inside.

Further work will be done to find out more about our Roman man, who was about 40 when he died. Thanks to funding from the Roman Research Trust, Isotope analysis will be carried out on his teeth which should tell us where grew up and what sort of food he ate. We will also be trying to reconstruct his face so that we can produce a painted portrait of him using the same materials and techniques used by the Romans.

Follow our progress as work proceeds over the next year.

We aim to complete the redisplay by the end of 2011 when you will be able to come face to face with the past!

Step 1

The coffin, skeleton and grave goods have been on display since 2002.

In that time it has become one of the most popular exhibits in the gallery.

Step 2

Gaps in the coffin allowed visitors to push things into the display.

These are some of the things we found, not exactly the sort of thing our Roman would like to take to the next life.

Step 3

Work begins. First the skeleton and grave goods have to be removed and stored safely.

While off display the skeleton will undergo further investigation in an attempt to find more about the man buried in the coffin.

Step 4

All modern materials added to an object must be reversible. This makes it easier to remove restoration without causing damage to the original artefact.

Here a reversible barrier is being painted onto the coffin. This will separate the original stonework from the material used to fill gaps and level the rim.

Step 5

Even the most awkward places have to be reached!

Step 6

The lid of the coffin must have a level surface to sit on!

Unfortunately much of the original rim of the base has eroded so with the aid of foam, double-sided tape and the glass top of the original display as a guide, we hope to establish a new level for the coffin rim.

Step 7

Layers of foam were stuck to the flat glass top. When the highest part of the coffin was reached this line was used as the level for the new rim.

Step 8

Now for the fun bit� mixing up the fill material.

This material must work like a putty and set hard when dry. Also be safe to use in the open gallery and similar in colour and texture to the original Bath stone.

We went for a mixture of air-drying clay, sand to reduce shrinkage and give texture. Acrylic paint for colour and extra bonding. This was a bit of a messy job and it took a while to get the mix right!

Step 9

Once the mix was ready the gap between the foam and the edge of the coffin was filled.

Step 10

Being careful not to get excess fill material all over the stone.

Step 11

Looks good, let�s hope the fill dries without to much shrinkage.

The colour of the fill is a bit light, not as golden as the original Bath stone. The Roman quarry for the stone is believed to be south of the ancient City of Bath. The stone is soft and easily carved when wet, but becomes hard on drying.

Step 12

Inspecting the days work! Hopefully when the glass and foam is removed the fill will be nice and level.

Step 13

The gaps in the side of the coffin have to be filled to prevent access to the skeleton once it is put back on display.

Step 14

The glass top and foam are removed and the new rim revealed. The fill has dried much lighter than expected so will have to be painted to make it less obvious.

Most of the fill will be hidden by the lid which extends over the edge and down the side. This overlapping edge use to rest on a ridge that ran round the top of the coffin base.

Remains of this ridge can still be seen on the right hand-side of the image just below the fill.

Step 15

The coffin was unearthed by a mechanical digger, which broke it into several sections. Most of the pieces were retrieved, but one area was so badly damaged no pieces survived.

Instead of filling the gap to complete the side, we decided to install a viewing window so small visitors to the museum can still get a good view of the skeleton inside.

Step 16

The coffin is extremely heavy and could not be moved out of the gallery safely. Therefore, all conservation work has to take place in the gallery, which has been quite challenging at times.

If you are visiting and see us there, come over and say hello, we are happy to answer any questions about the project.

Festival of British Archaeology 2009

So the festival ended. After two weeks of almost continuous events across three of Amgueddfa Cymru – National Museum Wales’s sites. And the best was definitely saved until last.

With fine weather throughout the day The Vicus put on a fantastic show. They performed a Roman funeral ceremony in the centre of St Fagans before a crowd of two to three hundred people. A young lady played the recently departed and two gladiators fought for her.

Then the mourners processed to the funeral pyre, an impressive timber platform around which more rituals were performed, and where the young lady was substituted for a pig.

There followed tense moments for the organizers. It’s easy to schedule a cremation ritual, and building the pyre wasn’t too challenging, but with all the wet weather the day before, would it light? With a hundred and fifty people watching as a fire brand was thrust into the middle of the pyre, a fizzle would not have looked good.

But good fortune smiled and the pyre lit, smoking heavily before the flames spread. The grave goods on the pyre were quickly burnt or broken, with one glass bottle melting in the heat.

It burnt for the rest of the afternoon, until by closing time on the site there was just a bed of ash with the unburnt back of the pig resting on top. By next morning almost all of this had burnt away and we set about recovering the cremated bones and the grave goods for further analysis.

Cremated remains are common finds from the Bronze Age and Roman periods and our work here will go some way to helping interpret these finds when they come up in future. So a great spectacle and a useful source of data.