xlv 
four to six feet, over which are found more or less stones, clay, and 
gravel. In some cases, where the foundation is very soft, as in 
island No. 2 of Drumaleague Lake, of which a section is given 
in drawing 2, fig. 2, the layers of timber are very deep. In other 
cases, where the ground is naturally firm, as in island No. 1 in the 
same lake, the platform of timber is confined to a portion of the 
island. See the plan of this island in drawing 2, fig. 1. 
‘5th. In almost every case a collection of fiat stones has been 
found near the centre of the inclosure, having marks of fire on them, 
and apparently having served asa hearth. In the island No. 2 of 
Drumaleague Lake there were three of these hearths found in dif- 
ferent parts of the inclosure. 
“6th. Considerable quantities of bones are generally found 
upon or around the island, being apparently those of deer, black 
cattle, and hogs ; the skulls of the cows being long and narrow, 
with very short horns. 
“7th. In almost every case one or more pairs va quern stones 
have been found within the inclosure. 
“8th. In many cases pieces of oak-framing have been found, 
with mortices and cheeks cut in them. Some of these, such as 
what were found on island No. 2 of Drumaleague (see drawing 3, 
fig. 3), appear to have been portions of an ordinary door-frame ; 
but others, such as those found on the island in Lough Scur and 
in Loughtown Lake (see drawing 3, figs. 1 and 2), are portions of 
a heavy frame, the use of which does not appear so evident. 
*« These structures were generally covered with water, and only 
discovered when the surface of the lake in which they lie was 
lowered in the course of the operations connected with the drainage 
of the adjacent land. In some cases a small portion of the centre 
of the island was visible when the lake happened to be at its low 
summer level, but seldom attracted any particular attention, being 
looked upon as merely the top of a shoal. The surfaces of many 
of these inclosures, however, were found to be two or three feet 
below the summer level of the water ; and one of those in Druma- 
league Lake was jive feet under water. 
‘The streams which form the outlets from many of these lakes 
run through strata of alluvial deposit and peat, in which great 
quantities of timber are to be found; and the inference appears to 
be natural, that the level of the lake has risen subsequently to the 
formation of the islands, and very probably in consequence of the 
