of Edinburgh, Session 1881 - 82 . 
749 
Thus, he says, that on the Island of Yell, there are “large fragments of 
Serpentine and Euphotide, which have evidently been drifted some miles, from 
the islands of Unst and Fetlar. ” 
“ On the summit of Roeness Hill, composed of red granite,” there is an 
“ immense quantity of boulders of a primary greenstone which appear to have 
been removed from a site 2 or 3 miles off, and to have been rolled in a S. or S. W. 
direction, up a gradual ascent of 3 or 4 miles.” 
“On the summit of Hilswick Hess, we meet with a surprising block, com- 
posed of granite, removed from a rock, the nearest site of which is about 2 miles 
to the N.” 
He had previously mentioned that, in the Island of Papa Stour, there are 
“numerous fragments of hornblende schist and actinolite schist” — “rocks 
which are nowhere to be met with in this archipelago, except at Hilswick Hess, 
a distance (when measured in a straight line across the Bay of St. Magnus) of at 
least 12 miles.” 
Dr. Heddle of St. Andrews informs the Convener, that he, some years ago, 
examined these “ Stones and formed an opinion that they had, by some 
natural agency of great power, been detached from a rocky cliff not far distant, 
and been moved in a direction towards E.S.E. They are a peculiar micaceous 
gneiss, containing nodules of white felspar. 
These “ Stones” are referred to in the Second Report of the Boulder Com- 
mittee, p. 178. 
2. Parish of Fair Isle. 
The Rev. William Laurence, catechist and teacher, reports 
as follows : — 
“ There are no boulders above 10 tons, hut there are several small 
ones of the pudding-stone description, quite different from the 
rocks in situ. There was one very remarkable large stone — a huge 
block of sandstone — quite similar to the “ Eday ”* sandstone, hut it 
was blown up by gunpowder last year, for building purposes. There 
was nothing like it in the whole island. 
“ It and the other small ones are probably glacial deposits.” 
V. Caithness. 
The Rev. Hugh Mair sends the following answers to a circular 
from the Committee : — 
“ Boulder in Keiss parish ; estate of Freswick ; farm of Mr. 
Peter Gunn ; proprietor, Wm. S. Thomson Sinclair, Esq. 
* Note by Convener. — The Island of Eclay is about 13 miles to the S.S.W. 
of Fair Isle. In the Geological Map of the Orkneys, lately published by 
Messrs. Peach and Horne {Quart. Jour, of Lond. Geol. Society for Hov. 1850), 
the rocks of “Eday” are represented as consisting of old red sandstone con- 
glomerate. The geology of 11 Fair Isle ” is not given by these gentlemen. 
