474 Proceedings of the Royal Irish Academy. 
present no very remarkable features. To the north of Lough Akib- 
bon, on the summit of the drumlin, in the townland of Whitehill, 
there was a large fort. It should also be mentioned that near the 
eastern shore of Lough Akibbon there are some small islands, with 
stone ramparts around them; the latter, however, have an aspect as if 
they might be modern structures to protect the islands from cattle 
when the water of the lake is low. 
From the above records it will appear that Derrybeagh lake would 
seem to have been a more important place than Glenveagh lake in 
ancient times. Iam therefore inclined to believe that it must have 
been the Loch Betha of the ancient annals. 
NOTES ADDED IN PRESS. 
The ‘ Giant’s Grave’ looks as if it might have been the site of a 
erannog ; but, after a careful examination, in the summer of 1886, when 
the lake was very low, I came to the conclusion that the stones in it, 
and the ‘‘ stepping-stones,” are the remains of the south-western ex- 
tension of the ‘‘ Bridge Island ”’ drift-hill. The ancient stronghold of 
the O’ Donnells, I suspect, must have been on the now so-called ‘‘ Lough 
Island.” Gull Island, however, has very much the appearance as if 
it was artificial. 
UnrecorDED Crannocgs In Co. Mayo. 
CastLeBar Laxe.—In Castlebar Lake, to the west of the town, there 
is a crannog now known as Boyd’s Island. Before the lake was 
lowered, about twelve feet, it was an island, but now it is joined on to 
the mainland. In the Geological Survey memoir it is recorded by 
Mr. R. G. Symes. After it became high and dry it was ravaged by 
the itinerant rag and bone merchants, who turned it over and carried 
away everything that they could convert into money. In the lake 
were found a dug-out canoe that used to be in the yard of the Castle- 
bar gaol, the horns of a megaceros, and several heads of the red deer. 
The canoe is now in the Royal Irish Academy’s Museum. 
Mourtt Laxr.—This lies a few miles southward of Westport, 
alongside the public road to Erriff. In this lake there is an unex- 
plored crannog, and it cannot be explored unless the water of the 
lake was lowered. 
Co. DonzGat. 
CotumBkILtLE Loven, a mile east of Milford, an island near the 
north shore, that seems to be a crannog.—This is said to be joined to 
the land by a cash, or path; but as the lake is now damed up, and 
used as a mill-pond it was always so full when visited, that the 
