Ceremonial dismemberment and excarnation in prehistoric Ireland - a different way to treat the dead

For a while, I've been wondering about how the small human bone fragments that have been found in some Irish passage-tombs came to be in such a fragmented condition. In terms of the unburnt bone human fragments found during the O'Kelly excavations at Newgrange, "apart from some complete hand and foot bones, all human specimens consisted of small fragments". (O'Kelly, Newgrange: Archaeology, Art & Legend, Thames & Hudson, 1982). 

Replica of basin stone from Knowth's eastern chamber with bone fragments.

There were a total of 750 unidentifiable fragments. The fragmented remains of dozens of individuals were found in the chambers of nearby Knowth. Layers of fragmented remains were found in the passage and chamber of Fourknocks. So how do human bones - those that are not cremated - become so fragmented?

Searching through my extensive archive of research material, I found an interesting article from the Sunday Times from July 2003. Eileen Murphy of Queen's University Belfast had studied Irish neolithic bones and found that our early ancestors had dismembered and defleshed their dead. Murphy had worked on the excavation of graves in Aymyrlyg graves in Siberia, Russia.

There she learnt to look for the tell-tale signs of what is thought to have been an ancient religious practice - short, fine scraping marks on the bone and cuts where tendons and ligaments were joined.
"After studying the dismembered and refleshed Russian remains, I decided to have another look at Irish neolithic bones. It is something that has been overlooked before and will now require a reassessment of our understanding of these ancient burial sites.

The researchers from Queen's made the findings when examining bones from the 4,000-year-old Millin Bay tomb in County Down, and the discoveries mirrored those found by Swedish archaeologists at Carrowmore in Co. Sligo. The Sunday Times article described how body parts, notably skulls, are thought to have been kept on display for religious purposes.

Gabriel Cooney, professor of archaeology at University College Dublin, told the newspaper:

In these tombs you rarely find single skeletons, but rather groups of cremated remains. In this way these neolithic people would seem to have been creating a new identity from their treatment of the dead. You also find different parts of the body treated in different ways, such as unburnt parts of the skull in with cremated remains. This would point to dismembering of the corpses.

Were the Brugh na Bóinne bones defleshed by humans or
by the process of natural outdoor excarnation?

Not all corpses were dismembered by other humans. The process known as excarnation, or defleshing , is well documented. This involves leaving the human corpse out in the open (sometimes known as sky burial), or in a cave, for the elements and wildlife to assist in the process of speedy decomposition and dismemberment. Some "excarnation sites" were outdoors, while others were in caves. It is estimated that a human corpse left out in the open can be reduced to a pile of bones in a matter of weeks or months. However, there seems to have been a deliberate effort made, in some cases, to slow down the process of excarnation by leaving a corpse in a cave.

A chance finding of a bone fragment in a cave at Knocknarea in Sligo led to the discovery of more bone fragments belonging to an adult and a child which may have been evidence of cave excarnation. Radiocarbon dating put the age of the bones at over 5,000 years old. It is thought that the process of excarnation in a cave took much longer - perhaps up to two years - but eventually the deceased's relatives would come back to collect the bones for burial elsewhere. In the case of Knocknarea, this burial might have taken place in one of several monuments on the top of the mountain.

We can imagine, therefore, that Stone Age people in Sligo between 5,000 and 5,500 years ago carried the corpses of their dead up the mountain. After an arduous climb, they then squeezed through the narrow cave entrance, and laid the dead person on the cave floor. (Source)

What's also interesting in Ireland is that osteoarchaeological analysis has revealed an absence of animal scavenging marks, suggesting that the entrance to the excarnation caves was sealed during the process of soft tissue decomposition.

This reveals a conscious decision not to speed up decomposition . . . By creating a protective environment in which excarnation took place undisturbed, people controlled the process, pace and space. The living may have sought to observe the slow and gradual disintegration that was taking place inside a cave. The underground was therefore a place of transformation, which in turn transformed caves as places. It may have been in caves that the journey into the spirit world commenced. (Dowd, Marion, The Archaeology of Caves in Ireland, Oxbow Books, 2015, p. 106)

Flint blades from Newgrange - were these used in the defleshing process?

There are no caves in the vicinity of the great passage-tombs of the Boyne Valley. It would be interesting to postulate on how the fragmented unburnt remains there - and indeed at nearby Fourknocks - came to be in that condition. Of course another question that begs to be asked is how many of the flint scrapers and other flint tools found at Newgrange and other passage-tombs were used in the defleshing of human remains . . .

No passage-tomb under Millmount?

Millmount might not have been built on a Stone Age passage-tomb, a public presentation of archaeological data heard last night in Drogheda.

However, one intriguing possibility based on the results of advanced archaeological techniques is that it might perhaps have been built on a clay mound, like a barrow, a type of burial monument dating to the Bronze Age, and therefore later than the likes of Newgrange, Knowth and Dowth.

Millmount might have been built on an ancient burial mound.

But it's still too early to say for certain what lies beneath the mound of Millmount, if anything. The new data is from the latest phase of the Millmount Archaeological Remote Sensing project, aptly shortened to MARS, because some of the technology being used is out of this world!

The presentation was given by Kevin Barton of Landscape and Geophysical Services (LGS), Conor Brady of the Department of Archaeology, Dundalk Institute of Technology, and Brendan Matthews, the Old Drogheda Society Community Historian.

The data presented last night was generated using Ground Penetrating Radar (GPR) and Electrical Resistivity Tomography (ERT). The GPR data was taken along eight transects of the mound, and Kevin Barton revealed that the signal "was totally absorbed" by the mound, indicating that it might consist largely of clay. This would seem to rule out the possibility that it is a cairn, built largely of stone, like Newgrange, Knowth and Dowth. There was a possibility of a slight "overlapping of layers" of clay in the mound, but this was by no means definite.

The Electrical Resistivity Tomography (ERT) data was perhaps the most exciting. This involves putting stainless steel electrodes into different parts of the mound and measuring the resistance based on Ohm's Law (Resistance equals voltage divided by current). A series of measurements were taken at the base of the mound, just above the modern revetment wall, spaced at 5 metres apart. There were four distinct "high resistance" areas along the perimeter of the base of the mound, with low resistance areas underneath them. Eighteenth century drawings show that Millmount had four towers around its base, and these four areas of high resistance might correspond to the location of those four towers.

Four sections of the mound were also measured using ERT, and Kevin Barton revealed results from these measurements which appeared to show a quite distinct area of low resistance at the core of the base of the mound. He said this area of low resistance would correspond in his mind to a large clay mound. However,  he said he could not rule out the possibility of a "cavity" in the interior - something like a passage-tomb or maybe a cist grave.

It would not have been uncommon for Bronze Age barrow to be built over a burial, which sometimes might be contained in a cist grave. This is basically a "box" consisting of large slabs of stone.

Community Historian Brendan Matthews suggested that a Bronze Age barrow-type mound might tie in with the mythology of the site, and that as the reputed burial place of Amergin, the figurehead of the Milesians who landed at the Boyne Estuary, a Bronze Age date might be more apt.

Earlier in the night, Conor Brady of DkIT gave an overview of the types of mounds found in Meath and Louth, including passage-tombs, barrows and a large number of unclassified mounds.

Brendan Matthews revealed that a small section of what might have been an earlier revetment wall, set back some distance from the modern wall, was found during a recent "cleaning up" of the site. He also showed a photo of a stone-lined drain which was found near the top of the mound.

Millmount as it looked in the 1740s, drawn by Thomas Wright.

He revealed that no major modifications had taken place at Millmount from around 1672 until the British fortified the site and built the martello tower on top of the mound in 1807-8. But in the mid 1780s a ditch around the base of the mound was filled in, and local people used it for gardening!

The presentation provoked a lot of questions from the audience, and there's no doubt it has focused minds on the possibility that Millmount is not a passage-tomb, and not, as suggested locally, contemporary with the great mounds of Brú na Bóinne.

However, there have been several people who reported in the 20th century that they had been inside a tunnel under Millmount, and so it is obvious from contemporary accounts that there is at least one subterranean passageway in there. Whether this is part of a passage-tomb structure, or maybe a medieval souterrain, or even perhaps tunnels built linking the 17th century towers is a matter of conjecture right now.

At this point, the Old Drogheda Society will be discussing the possibility of moving on to the next phase of the project, which involves a seismic technique that measures the response of sound waves through the monument. That could provide a more definitive overview of the mysterious mound of Millmount.