On the bank of the river near Slidry, there is a long grave-like mound, distinguished by two large erect stones standing, the one at the head, the other at the foot, at an intervening distance of about 30 feet. This is supposed to be an elongated trench, in which the warriors slain in battle have been buried; tradition claims it as the grave of one of Fingal’s heroes.
from ‘On the Rude Unsculptured Monoliths and Ancient fortifications of the Island of Arran’ by Mr John McArthur. In ‘The Edinburgh New Philosophical Journal’ – v9, 1859.