The oak beams were sawn, not split; they seemed to run nearly N. and S.; through them, at distances of nine inches, were pairs of dowels, and at intervals of nine inches were ash poles, two and a-half inches thick, through which the dowels passed and secured the flooring beams. The wicker-work flooring was formed of hazel rods; and the crannog would appear to have been divided into huts, or apartments, as portion of a row of ash piles was observable. Below the beams there was a stratum of peat; but in consequence of the rapid influx of water, the working had to be abandoned at this point. No relics were discovered, owing probably to the narrow area of the excavation. _East Island_ (4) was of irregular pear-shape, sixty-seven yards by fifty; it lay three hundred feet from the southern shore, and seemed to be partly natural, partly artificial. An excavation in the centre gave four feet of peat, and under it was shell marl, whilst for a radius of about twelve feet around the island there were layers of regularly-placed stones, small and flat; also at the S.E. shore there were two beams, seven inches wide; the height of the water, however, precluded further examination. The lake occupied a hollow among low hills, the only outlet being at the village of Ballinlough, where there is an artificial cut through a bank of coarse boulder clay. If this cut were filled up, the water would rise at least four feet higher than at present; and it would seem to have been at that level not long since, for all round the beach, to over that height, there is a deposit of shell marl and peat. In the bank of drift on the west of the village is the trace of an ancient ravine, _artificially filled up_ with stuff taken from an oblong excavation (marked _a_ on fig. 217). To account for this artificial filling, it may be suggested that the inhabitants of the crannogs were flooded out by an enemy, who stopped the egress of the lake, thus raising the water until the islands were swamped; after this they remained submerged until the opening of the present cut. In later years they had been occasionally occupied for purposes of illicit distillation.[244]