"a dark bank of brush-wood called the Bogle-heuch"

Bogle-heuch is either a local sobriquet or a place invented by Hogg, for it does not appear on maps. Its name, however, is an interesting one, with ‘heuch’ meaning steep-sided valley and ‘bogle’ meaning spectre or bogeyman. There could be no more apt place for the two women to witness the uncanny scene that follows.