This was the celebrated conflict at Glenfruin, near the southwestern extremity of Loch Lomond, in the vicinity of which the MacGregors continued to exercise much authority by the _coir a glaive,_ or right of the strongest, which we have already mentioned.
There had been a long and bloody feud betwixt the MacGregors and the Laird of Luss, head of the family of Colquhoun, a powerful race on the lower part of Loch Lomond.

The MacGregors' tradition affirms that the quarrel began on a very trifling subject.

Two of the MacGregors being benighted, asked shelter in a house belonging to a dependant of the Colquhouns, and were refused.

They then retreated to an out-house, took a wedder from the fold, killed it, and supped off the carcass, for which (it is said) they offered payment to the proprietor.

The Laird of Luss seized on the offenders, and, by the summary process which feudal barons had at their command, had them both condemned and executed.