482 Proceedings of the Royal Society 
to the west, against which the glacial current is supposed to have 
impinged, while, against its eastern face, there is a gently sloping 
mass of gravel, clay, and stones supposed to have been thrown up 
by this current under “lee” of the Law, and now forming what 
is called the “tail.” It had often occurred to me as remarkable, 
that so great a mass of debris should have been left by the passing 
current, whatever that may have been, on the eastern extremity of 
the hill, while it had apparently left no impression on the north 
and south sides, along which it must have passed. These north 
and south sides, in their present condition, and to a casual observer, 
have the ordinary appearance of rough, angular weather-beaten 
rocky faces, without a trace of glacial action. However, when 
making an engineering examination of the country around North 
Berwick in September last, in search of an available water-supply 
for the town, I found ceitain very distinct traces of glacial action 
on the northern side of the Law, which, in connection with the 
“ crag and tail” feature to which I have referred, must, I think, 
be interesting to the geologist, while they may possess additional 
interest from their being on a steeply inclined open hill face, and 
not in a ravine, or on nearly horizontal or slightly inclined strata. 
They extend vertically over a space of about 30 feet, indicating 
the action of a moving mass of at least that depth. They can be 
traced horizontally over a space of about 200 feet, and they range 
from 160 to 190 feet above the sea-level. They present the usual 
two-fold glacial aspect of smoothly-ground undulating surfaces, 
indented by occasional deep striae or scorings. These two kinds of 
marking may have been made at the same, or at different periods, 
but the same abrading agent could not have produced both of 
them. The grinding or dressing, as it has been termed, of the sur- 
face is very distinctly marked, and must have been done by the 
passage of some dense, but yielding body, which could be moulded 
to the different irregularities, both vertical and horizontal, in the 
surface of the hill, which must obviously have been subjected to 
the grinding action for a considerable period before the observed 
effect could have been produced. The striae again, must have been 
made by the passage of sharp-pointed bodies, harder than the 
felspar porphyry of the Law, and carried in a mass of material 
of sufficient density firmly to retain the sharp, rocky protuber- 
