Two hundred Buchanans and Colquhouns were slain on the field, and though many of the Clan Alpine were wounded in their furious charge, it is remarkable that only Ian MacGregor and another of the clan were slain.
They lie buried on the field, under a large block, which is named "The Grey Stone of MacGregor."
A little rivulet near it is still named "the stream of ghosts;" for there Fletcher of Cameron, a follower of the Clan Alpine, is said to have slaughtered a number of clerical scholars, who had come from Dumbarton to see the battle; and it is still believed that if a MacGregor crosses it after sunset he will be scared by dreadful spectres. Yet, to preserve these boys from bullets and arrows in the hour of battle, it is alleged that Alaster of Glenstrae humanely enclosed them in a little church, the thatched roof of which was fired accidentally by the wadding of a musket, and they all perished in the flames. Others say they were all dirked by Dugald Ciar Mhor, from whom Rob Roy was lineally descended, and that he slew them like sheep, at a large stone, from which the blood can never be effaced.
Being mounted on a powerful horse, Sir Humphry Colquhoun, minus sword and helmet, escaped from the field, and fled to the castle of Bannochar, where he was afterwards slain, when concealed in one of the vaults, not by MacGregors, but by some of the MacFarlanes, though the blame of the deed was unjustly thrown on the former.
To James VI., his successor and friends made a doleful report of the battle, in their own fashion, and there came before that monarch, at Stirling, a strange procession of eleven score of women, bearing each, upon a spear, a bloody shirt, purporting to be that of a husband or kinsman slain in Glenfruin.
These females had been mostly hired at so much per head, in Glasgow, for the pageant, and the blood on the woollen shirts was that of a cow, bled expressly for the purpose; but this melo-dramatic exhibition was singularly successful.
James was so incensed that, without further inquiry, he issued letters of fire and sword against the MacGregors; and then the Colquhouns, the Buchanans, the Camerons, and the Clan Ronald joined with others, in a species of crusade, to crush them. They were hunted throughout the land, like wild animals, but could never be suppressed; for, whenever a MacGregor fell, the sword of another appeared to avenge him.
Captured by treachery, Alaster of Glenstrae, the gallant victor of Glenfruin, was ignominiously hanged, at the cross of Edinburgh, with all his nearest kinsmen, the sole honour awarded to him being a loftier gibbet than the rest.
By an Act of the Scottish Legislature, the surname of MacGregor was abolished, and they were compelled to adopt others. Some called themselves Gregory and Gregorson, and some Mallet, of whom the grandfather of the poet of that name was one. Many took the name of Grahame, but many more allied themselves with the powerful House of Argyle, taking the surname of "the Great Clan;" hence, a hundred years after the grass had grown above the graves of the dead in Glenfruin, we find Rob Roy designating himself Campbell, the name of his mother!
The same Act ordained that none of the race of Alpine should have in their possession any other weapon than a pointless knife, wherewith to cut their food; yet, in defiance of the Act, the Clan Gregor went armed to the teeth as usual.