Flints found on Waddon Marsh. 23 
Here is upon the table a flint which to all appearance has 
been partly manufactured into an arrow-head, but probably dis- 
carded from an accident in flaking or working, and has been cast 
on one side; also other flints, which one might almost assume 
were in process of manufacture. 
Many of the flints, that would most likely be passed by a 
casual observer, are worthy of careful examination, for it will 
be seen a good many possess a business edge, and probable wear 
from use. 
A small flint used for hammering, showing the small fractures, 
which is a well-known sign of what it has been used for, is 
amongst the larger flints shown; and since I have made the 
previous notes a small piece of hard sandstone, which is 
very much worn, has come to light. It is somewhat oval in 
form, and has the appearance of having been used on one 
side, a groove in the centre being polished, and is certainly 
curious. 
With this I must not detain you longer, but I am in hopes 
that, as the ground gets more broken up in the immediate 
neighbourhood of the Waddon Marsh, other examples may be 
found, which may supplement the present small collection 
before you this evening. 
6.—Tue Parautet Roaps or Guen Roy. 
By Dr. T. Arcurpatp Duxzs, B.Sc. 
(Read October 20th, 1903.) 
_ Waar are these ‘ Parallel Roads” of Glen Roy? They are not 
highways for traffic; nor even footpaths. They are just terraces 
or ledges making lines along the mountain-sides. Of course, 
there often are ledges or shelves upon mountains; but these are 
unusual, extraordinary, even strikingly so. They run for miles 
and miles right up to the very ends of the valley; they run into 
all the branches and arms of the valley; they are quite hori- 
zontal; there are three of them, one above the other; and they 
are upon both sides of the valley. 
The causation of these curious terraces, or Roads of Lochaber, 
as they were called, has attracted the interest of most of tie geolo- 
gists of the last century. Since, however, the various theories of 
their causation appear to be mutually destructive, I have ventured 
to suggest another cause which seems simple and natural. 
