glasgow archaeological society.
the northern slope the ground is very wild and rough. There are
many large dolerite blocks, sometimes grouped in what might
pass for stone circles, but oftenest strewn, as it were, broadcast
over the moor. The slopes which the vallum surmounted are
steep and frequent; indeed, with the exception of Barr Hill,
the route of the wall has no bolder acclivity to scale, and, in
point of structural difficulty, the Roman engineers had probably
more to contend with here than anywhere else. The ditch must
have been particularly troublesome to dig, by reason of the
immense stones which lay in the soil. In places, its course had
to be driven through solid rock, and Gordon spoke well1 when,
commenting on its " long continued track of rocks and frightful
precipices," he said that here " there is more of the Roman
resolution and grandeur to be seen than on its whole track."
The ditch is very distinct from end to end of Cro}^ Hill, running
for a considerable distance at the foot of a high, precipitous rock
face, back from the top of which, and of course many feet above
the ditch, the vallum takes its way along the summit of the
ridge. The vallum itself is for the most part not so externally
traceable as the ditch, but is disclosed by sections laying bare its
base of stone. Only on the summits of the second and third
ridges, and down the western slope of the latter, is its faint
curve outwardly apparent.
Several hundreds of yards north of the vallum, the ground
slopes very sharply down to the level of the marshy ground
drained by the Kelvin, the source of which is close by.
Through this lowdying ground, more than 300 feet lower in
level than the summits of Croy Hill, the Forth and Clyde
Canal pursues its course, spanning, like the ancient Vallum
of Antonine, the isthmus of central Scotland and joining- the
shores of the east and west. .
Croy.—Section No. 1.
[Vallum almost obliterated and fosse nearly filled up. Section
—t' . '< limited to vallum.] [ .;• -. •. .
This cutting, 78 feet west of the stone dyke dividing the moor-
land of Croy from the arable ground of Wester Dullatur, lies at
1 Itin. Sept., p. 56.