34S 
1916-17.] The Bone-Cave in the Valley of Allt nan Uamh 
The Corstorphine lake occupied a hollow in the boulder clay. The ice 
had finally retreated from the lowlands of Scotland, hut glaciers still 
lingered in some of the Highland valleys. The deposits of the 100-feet 
beach, which have yielded at certain localities shells of an arctic type and 
bones of the small arctic seal, were then being laid down. Indeed, all the 
available evidence seems to point to the conclusion that the Corstorphine 
Lemming is of late glacial age. 
The deposits of the Creag nan Uamh bone-cave are certainly later than 
the accumulation of the ground-moraine in the valley of Allt nam Uamh. 
They seem to us of special interest and importance from the light which 
they throw on the mammalian and avian life that flourished in the North- 
West Highlands since the climax of the Ice Age and during Neolithic time. 
Our special thanks are due to Mr Spencer L. Arnot for the photographs 
of the bone-cave and the drift deposits in the valley of Allt nan Uamh 
which are reproduced in Pis. II and III, to Dr W. Inglis Clark for the 
photograph of the thrust-plane in the Traligill river from which Pl. I 
has been made, and to the Carnegie Trustees for a grant in aid of the 
illustrations. Mr John Mathieson, H.M. Ordnance Survey, has kindly 
revised the spelling of the Gaelic place-names appearing in the text. 
