Mystery of medieval cemetery near airport runway deepens

Rebecca Morelle
Science editor@BBCMorelle
Alison Francis
Senior science journalist
Kevin Church/BBC Partial skeleton of a child, estimated to be seven or eight years old, lying in a grave cut into the natural limestone. The skull,  arm and leg bones are clearly visible and a few of the ribs too, but they are jumbled up. There are lots of grey coloured stone forming the bottom and edge of the grave and others poking out of the ground all around. Kevin Church/BBC
The team has so far found 41 skeletons buried in the cemetery

A medieval cemetery unearthed near Cardiff Airport is continuing to confound archaeologists, as the mysteries surrounding it are multiplying.

The discovery of the site, dating to the 6th or 7th Century, was announced last year, with dozens of skeletons found lying in unusual positions with unexpected artefacts.

Now researchers have learned nearly all of those buried in the cemetery are women, and while their bones show signs of wear and tear - indicating they carried out heavy manual work - there are also surprising signs of wealth and luxury.

Another unexpected find has been a woman tossed in a ditch, in stark contrast to all the other people who were buried with great care.

Kevin Church/BBC The bones of the woman found in the ditch are laid out on a table with a black background. The skull is in fragments but is mostly there and the teeth are all very clearly visible, though some are separate from the jawbone. Not all of the bones are present but there are some vertebrae, ribs, shoulder bones and the limb bones. Kevin Church/BBC
The skeleton of the woman found in the ditch is being analysed in the lab

"Every time we think we understand something, something else crops up and the picture gets more intriguing," said Andy Seaman from Cardiff University, who is leading the project.

About half the site, which lies in an unremarkable field in the grounds of Fonmon Castle, has now been excavated.

So far researchers have found 39 adult skeletons lying in graves carved out of the thick limestone bedrock. A full analysis is still ongoing, but it's thought that all apart from one are female.

"I'm not entirely sure what it means just yet," said Dr Seaman.

"It could be that it's something particular about this community, or it could be that this is perhaps just one cemetery within a broader kind of landscape or it might be that there's more men in another part of the cemetery."

Kevin Church/BBC The bones of a skeleton are partially exposed in the bottom of a grave. A hand, holding a sort of scalpel, is carefully removing the brown soil from around one of the bones. There are other grey limestone rocks also in the grave around the bones. Kevin Church/BBC
Excavating the fragile bones is painstaking work

The skeletons of two children have also been found - a surprisingly small number given the high infant mortality of the time. Their burials also have some intriguing features.

"The earth that's been used to backfill the grave looks slightly different to that in the adults' graves," explained Dr Marion Shiner, an archaeologist from Cardiff University.

"It's darker and seems more organic, so potentially some time had elapsed between the burial of the adults and the burial of these two children - it's more mystery."

Kevin Church/BBC Hand holding a small shard of glass that was found by one of the graves. The glass is about two centimetres wide and has delicately etched stripes. Kevin Church/BBC
Delicate fragments of imported glass have been found close to the graves

Artefacts at the site are also adding to the puzzle of who these people were.

Shards of pottery and fine, etched glass unearthed in the graves were most likely brought to the cemetery by people feasting while they visited the dead.

"Glass is rare, and where it is found these are sites of quite significant status," said Dr Seaman.

"It was probably made in the Levant - the Egypt area - and then was manufactured into vessels, we think, in southern France, and probably arrived here alongside wine in barrels."

The presence of these items suggest this was no ordinary community. And each person here has been buried with painstaking care, some laid flat, others crouching, all facing from east to west.

The team don't yet know why the woman flung into the ditch was treated so differently, but believe she could have been an outcast or a criminal.

They have taken her bones to the lab at Cardiff University to try to find out more about her.

Osteologist Dr Katie Faillace says she thinks the woman was in her late 30s or early 40s.

Her skeleton shows a healed fracture to her arm, while her tooth was infected and had an abscess, which exposed the roots and must have been painful.

Kevin Church/BBC A cross-section of a tooth set in a disc made of opaque resin, photographed  against a black background. The two roots of the tooth can be seen and the inside of the tooth plus the top that would have been exposed above the gums. Kevin Church/BBC
Teeth can reveal more about what this medieval community was eating

Ten of the skeletons are also now undergoing more detailed analysis.

The results show the people buried in the cemetery aren't all from the immediate area - they come from all over Wales and possibly from the south-west of England too.

Further DNA analysis will also reveal whether any of them were related.

The team are particularly interested in the skeletons' teeth.

Because of the way teeth grow, they provide a unique record of everything someone has eaten from the time they are weaned right through to their death.

"They've been eating a very consistent diet based on lots of carbs - but not a lot of meat," said Dr Faillace. "And that's true from their childhood into their adulthood, and that's something we're seeing across the population.

"But there was no fish whatsoever. As soon as the Romans leave, we see an absence of fish signals in the diet. It's one of the big mysteries."

Kevin Church/BBC A wide shot of the cemetery with rocky ground in the foreground and lots of archaeologists in the centre working on the graves. There are lots of black buckets in a row along the edge of the graves being excavated and 10 people scattered around in different positions - some digging some talking, some standing, some kneeling and bending over into the graves while they dig. Kevin Church/BBC
Half the site has been excavated by so far

The dig is continuing this summer and the archaeologists will start to unearth the other half of the cemetery.

Andy Seaman is hoping to be able to answer the questions the site has thrown up.

"We're hoping to tell the story of the individuals within the cemetery, but also the broader community," he said.

"We know a lot about the lives of kings and queens, but much less about everyday people. And never before really have we been able to explore a single community in so much detail and all the interesting inter-relationships."

But for the moment there are still many contradictions that remain unsolved.

A thin, grey banner promoting the News Daily newsletter. On the right, there is a graphic of an orange sphere with two concentric crescent shapes around it in a red-orange gradient, like a sound wave. The banner reads: "The latest news in your inbox first thing.”

Get our flagship newsletter with all the headlines you need to start the day. Sign up here.