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about 2500 feet. On south side of summit level, between 
Glen Lyon and Rannoch, a cliff called the Scaur, half a mile 
to N.W. of boulder. Rochs in situ clay slate. If boulder 
came, as seems probable, from W.N.W., transporting agent 
must have passed on one side or other of Scaur. Configura- 
tion of hills here not favourable for glacier. Boulder within 
about one mile of summit level, which probably only 200 to 
300 feet higher than it. Boulder may have been broken up 
by action of frost, or by having fallen from transporting 
agent. First theory not probable, as interior surfaces of frag- 
ments appear as weathered as any of the exterior sides of 
boulder. 
About 500 feet below boulder, on banks of river Yar, thick 
beds of boulder clay, sand, and gravel, full of rounded boulders, 
indicating aqueous deposits. 
Hill on east side of Yar, facing west, much covered by 
boulders, as if brought from westward by some agent, whose 
progress intercepted by hill. One of these boulders, known 
by name of “ Clach na Tarbh,” or Stone of the Bull. 
Killiecrankie . — On east side of Killiecrankie Glen, on Fascally 
Estate, two ravines, parallel to one another, show very high 
cliffs of detrital matter full of large boulders. In the 
southmost of the two ravines, the scaurs are about 100 feet high. 
These scartrs in the higher parts of the ravines show sections 
of stratified sand and fine gravel to a large extent. Traced 
these up to a height of about 1570 feet above sea (by aneroid). 
Was told by Rev. Mr Grant, of Tennandry, that at or near 
the hill of Ben y Gloe, there are beds of sand and gravel at a still 
higher level. 
Some of the boulders in the most northern of these two 
ravines, which bad fallen out of the drift deposits, were of 
large size ; one, on being measured, showed 12x6x5 feet. 
The following kinds noted : — Granite, grey, fine grained ; 
granite, red, very coarse grained; gneiss, quartz, porphyry, 
limestone, primitive. 
There is a large angular limestone boulder at the Pass of 
Killiecrankie, about \ mile north of Tennandry mass, sticking 
in boulder clay about 856 feet above sea. These limestone 
