of Edinburgh, Session 1872 - 73 . 177 
north of mainland). When there, he heard of large boulders 
half-way between Hillswick and Ollabery. 
He has procured for Committee, pencil sketches of three 
boulders, situated in extreme north of the mainland between 
St Magnus’ Bay and Yell Sound. They are syenitic, same 
as singular “stacks” in that district called the “Drengs” 
(needles). One near Eela- water, 16x12x6 feet; another, 
called “Crupna” (bent?), 11x8x8 feet; another, called 
“ Bonhus,” situated between the two others, is 8 x 10 x 10’8 feet. 
In two places, about 20 miles asunder, he met with striae on 
rocks; — one a mile north of the Fishing Huts of Stennis, on 
N.W. shore of St Magnus’ Bay, on coarse conglomerate rock ; 
the other at centre and bottom of a valley, about half a mile 
wide, and bounded by hills 200 or 300 feet high, near Maris 
Grind, in front of farm house of Islebury, on quartzose gneiss. 
At both places striae were E. and W. (true). At Islebury, 
valley runs N. and S., so that the agent which striated rocks 
there, crossed valley at right angles. 
Foula . — Five boulders from 3 to 5 cwt. each, and two boulders 
about 2 tons each. 
The five are at Hametown in south end of island, and lie on 
the north side of what was a strait, when land submerged, but 
now a valley between the Noup Hill and Hill of Liorafield. 
“ Of these five, two are granite from Culswick, and three gneiss 
from (I would say) the Delting Hills. The compass bearings 
of these places from the boulders are (I would say) N.E. 
These five boulders are as smooth as if taken off a beach a 
short time ago.” 
The two boulders of 2 tons each are in middle of island, 
and of irregular shape. 
From middle of island to south end, and as high up as 700 
feet, granite and gneiss drift ; but had not time to examine the 
north end of the island. 
“ The drift must have come from either Culswick 16 miles, 
Norshaven 30 miles, or Delting 30 miles, borne along by tides 
similar to what we have now, and which set in the direction 
of Foula from the mainland. 
“ I shall send by and by a lengthened report, on drift in 
