27.7 
of Edinburgh, Session 1880-81. 
The contour lines on the ordnance map indicate that the longer 
axis of Schehallion runs about W.N.W. and E.S.E. It has a large 
flank facing the W.S.W., which could, therefore, readily intercept 
any boulders brought from any point between S. and W.N.W. 
Since the foregoing paragraphs were written, I have found further 
proof of there being granite boulders on Schehallion, in the follow- 
ing extract from a paper by the late Eobert Chambers in the 
“Edinburgh New Phil. Journal for 1855 ” (vol. i. p. 101). 
“ Schehallion is composed of quartz rock. It is abrupt to the west, 
and tails away to the east. I found surfaces at several places 
bearing that peculiar streaking which I had remarked as a glacial 
phenomenon peculiar to quartz rock, on the mountain of Queenaig 
in Assynt. At about the height of 2200 feet above the sea, there 
is a fine group of examples. There is another similarly striated or 
streaked surface, a few hundred feet below the summit of the hill. 
The direction of the striation in both instances is W. 30° N. 
About 800 feet below the summit, I found a block of granite ; and 
in several other places there are blocks of other rocks, likewise 
different from those of which the hill consists. Erom all I have 
seen, I entertain no doubt that Schehallion owes its form to a 
glacial agent, which has engulfed the whole range.” 
These observations by Dr Chambers and me confirm Professor 
Heddle’s statements : — first , as regards the existence of granite 
boulders on Schehallion ; second , as regards the direction of the 
stream which brought them ; for there can be little doubt that the 
transport of boulders and the striation of rocks on such an isolated 
mountain as Schehallion can be well accounted for by the same 
agency. 
The result of these explorations in the Black Mount district has, 
therefore, been to confirm the correctness of the conclusions come to 
in the previous year, that boulders had been strewed over the dis- 
trict in a sort of trainee from Albannach Hill in an easterly direc- 
tion, and that portions of the stream had. reached Schehallion. 
Some of these boulders were in last year’s Keport stated to have 
been found at a height of 2530 feet above the sea. This year’s ex- 
plorations showed them in positions 2498 feet (on Geal Charn) and 
3407 feet (on Schehallion) above the sea. 
Albannach Hill reaches to a height of 3425 feet above the sea. 
