of Edinburgh, Session 1881 - 82 . 
757 
Of course it is most improbable that the boulders on Tulloch 
Hill, at a height of about 1000 feet above the sea, could have been 
derived from the rocks forming the channel of the Black "Water, at 
a height of only 500 feet above the sea. The parent rocks must 
have been at an elevation above that of the boulders. It only 
remains therefore to examine the adjoining hills, exceeding 1000 
feet in height, to see whether they contain granite rocks of the same 
variety, or in the channel of the Black Water at Inchbae. 
“ I found granite boulders in large numbers, and of huge size, in 
the bed and on the banks of Alt nan Cuirach , four miles west of 
Tulloch Hill, and on move to E. conglomerate ridge, ending at Ciodi 
Mhor. The river has washed out many of these boulders from the 
base of scaurs of yellow boulder clay of a depth of from 40 to 60 
feet. These boulders were traced at heights from 1000 to 1200 feet 
above the sea from river bed at a spot due S. from Loch Glass. 
They probably came from Carn-Cuineag, through the opening occu- 
pied by Loch Glass. Both Alt nan Carioch and the river Glass, of 
which the former is a tributary, cut all the way down to Evanton 
through deep cliffs of boulder clay, resting on hard sandstone strata 
dipping S.E. The granite boulders are imbedded at the very base 
of the clay deposits.’ 7 
[The Convener being struck with the account given of the striae 
and cup marks on Boulder Ho. 3, wrote to Mr. Morrison, to ask 
whether any idea existed in his mind as to the possibility of the 
striae having been formed after the cup marks had been formed. 
His answer, dated 24th April 1882, is — “The suggestion forced on 
the mind unquestionably is, that the cups were partially obliterated 
by the scoring agent, and hence were made before the natural striae.” 
If this suggestion is supported by further examination and study, 
it would indeed be a very marvellous discovery. 
As Mr. John Campbell, in his Frost and Fire , refers to this dis- 
trict, the Convener gives the following extracts from his work : — 
Page 149.— “Above the Inn at Garve, at about 600 feet, grooves 
on a rib of white quartz, turn with the glen. They do not point at 
Wyvis, or up into Strath Bran. They coast round a hillside, care- 
fully avoiding the high hills, as rivers do at a lower level. They 
point S. 45° E. 
“ At the end of Loch Garve, beside the road, grooves on contorted 
