At the north end of the barrier, and at the termination of the pass, lies that part of the cliff which is called Craiganuni; at its foot the arm of the lake gradually contracts its water to a very narrow space, and at length terminates at two rocks (called the Rocks of Brandir), which form a strait channel, something resembling the lock of a canal.

From this outlet there is a continual descent towards Loch Eitive, and from hence the river Awe pours out its current in a furious stream, foaming over a bed broken with holes, and cumbered with masses of granite and whinstone.
"If ever there was a bridge near Craiganuni in ancient times, it must have been at the Rocks of Brandir.

From the days of Wallace to those of General Wade, there were never passages of this kind but in places of great necessity, too narrow for a boat, and too wide for a leap; even then they were but an unsafe footway formed of the trunks of trees placed transversely from rock to rock, unstripped of their bark, and destitute of either plank or rail.

For such a structure there is no place in the neighbourhood of Craiganuni but at the rocks above mentioned.

In the lake and on the river the water is far too wide; but at the strait the space is not greater than might be crossed by a tall mountain pine, and the rocks on either side are formed by nature like a pier.