Picture of a souterrain in a ringfort or rath which has been half
excavated in advance of road works in Ballygawley, County Armagh, Northern
Ireland.
The souterrain or `artificially built cave' is often found
in association with ringforts and other enclosed settlements of the pre-Norman
period such as promontory forts. They are found throughout the country but have
only recently been studied in any detail by P. Gosling for Co. Louth. He found
that of the 250 examples known in Co. Louth there were high concentrations in
the area to the west and north of the town of Dundalk. He attempted to
establish a chronology for these problematic structures as well as to identify
their main functions. Although they are not confined to Ireland, being found
also in western Cornwall, Scotland and Brittany, very few datable finds have
been located in association with them. The second major problem is that they
also vary greatly in both size and plan, so much so that it has been difficult
to isolate their major functions. In Cornwall the fogous (souterrains) are
nearly always found in association with surface features, including `rounds'
which are broadly similar in function to the ringforts. Thus it has been
asserted that they were probably used for storage rather than for any defensive
reason. Undoubtedly, some souterrains were used as safe hideaways for the
inhabitants of nearby surface settlements because they contain either traps or
some form of obstruction to confuse any intruder, such as the fine example at
Donaghmore, Co. Louth. We are also lucky to have a dendrochronological date of
AD 822 ± 9 for the oak posts which originally supported a roof of oak planks in
the chambers of a souterrain at Coolcran, Co. Fermanagh.
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In her recent valuable survey of the archaeology of early
medieval Ireland, Nancy Edwards takes a negative view of the continuity of
clachans and the existence of nucleated settlement: `However, there is as yet
little to support these hypotheses in the archaeological record, where, though
open and partially enclosed settlements may have housed the lower echelons of
society, they do not appear to have been nucleated.' She pointed to the
evidence of isolated souterrains that have little or no above-ground features
but `from time to time buildings have been successfully located indicating open
or only partiallyenclosed settlements with one or more houses and
outbuildings'. Some of the souterrains are large and extensive and it has been
suggested that they were the refuge centres for unenclosed nucleated
settlements above ground. Caution is necessary since aerial photography has
revealed crop-marks that show aboveground enclosures around souterrains that
had appeared, previously, to have been unenclosed. Nevertheless it is interesting
to note that `of the 3,000 examples recorded nationally, only 40% are recorded
in association with enclosures'. The dating of souterrains is loose but it is
generally felt that they fall in the second half of the first millennium AD.
The debate concerning the relationship between souterrain distribution and
`tribal' areas is lacking in sophistication - even assuming that `tribal' areas
exist for the period in question. Ultimately it will require archaeology to
prove or disprove the theory that souterrains, in some locations, are the
underground element of unenclosed settlements, and more precise dating will be
necessary before discussing the relationship between distribution patterns and
communities.
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A way of providing secure storage was by constructing a kind
of cellar. In Cornwall, it took the form of a stone-lined trench, roofed by a
series of lintels, and in this case it could be associated with an individual
house (Christie 1978: 314-33). These features are called souterrains and occur
also in Brittany. There is no obvious difference between the structures found
on these sites and those in the larger enclosures which are usually described
as hillforts. Although there are some signs of open settlements during the
Early and Middle Iron Ages, enclosures are densely distributed across the
landscape and may have been largely self-sufficient. Wheelhouses were sometimes
associated with souterrains, but the connection between storage structures and
individual dwellings is entirely different from the more centralised system
illustrated by hillforts in southern Britain.