26 Dr. T. Archibald Dukes on 
looking back, to be doubtful where it is. Let us then go up to 
the middle or second ‘“‘road.’’ It is by no means obvious to look 
at; it is just a slight alteration of the general inclination of the 
mountain-side, such as frequently occurs where any depth of soft 
soil lies ona slope. This forms a terrace or landing, rather more 
level than the hill-side, which again is extra steep just above and 
below it. This terrace makes a strip from 20 to 60 ft. broad, 
with rather more grass growing on it, between two narrower 
strips with rather more heather than usual. It is quite easy to 
doubt if any one spot is really part of the road, until you look 
wide and abroad; then the effect is indeed remarkable. It is 
one GLEN ROY 
LOOKING NORTH. 
Fig. 3.—A sketch-view looking up Glen Roy as seen when standing on the 
middle “road,” showing how in that position the middle “road” appears 
everywhere in one straight horizontal line. 
just like when a diver raises his head above the surface, and sees 
the shore all round him—everywhere in one straight horizontal 
line. 
You may get some idea of this effect from the above view, in 
which the second ‘‘road”’ is drawn in one straight line from hill 
to hill; in fact, a piece of stretched string held before the eye 
can be made to eclipse that middle ‘‘road’’ all along. This is 
equally true of the upper and lower ‘‘roads’’ when you are 
ba 
