William was about to leave England to take command of the allied forces on the continent. At his departure he wished to finish the pacification of Scotland. His late deputy, Lord Melville, had allowed the Presbyterians to assume a dominating position which seriously threatened the liberty of the Episcopalians. He was replaced by Sir John Dalrymple, known in history as the Master of Stair. Eloquent and able, he had conceived the idea of detaching a certain number of Highland chiefs from the Jacobite cause by bribery. A considerable sum had been effectively spent among men proud and uncultured, but poor and exhausted by their warlike efforts and their domestic feuds. Numerous chiefs made their submission, notwithstanding the repugnance inspired by Lord Breadalbane, who was employed by the Master of Stair in these negotiations, and whom his connection with the Campbells rendered suspected by the mountaineers. On the 31st of December, 1691, Macdonald of Glencoe, or MacLean, as he was called in the Highlands, found himself almost the only one to refuse the oath of allegiance.

He made up his mind, at last, but too late. When he presented himself at Fort William, the fixed time had expired, and no magistrate was present. The old chief, alarmed at last, betook himself to Inverary; they refused for a long time to accept his submission. McLean returned to his mountains, whither an unjust and cruel vengeance was about to pursue him.

The Master of Stair had consented to become the instrument of the hereditary hate of the Campbells; it had been represented to him that this was the price of the pacification of Scotland. His orders had been issued in advance for the destruction of all the clans which should not have made their submission before the 1st of January, 1692. "Your troops will ravage all the district of Lochaber, the domains of Lochiel, Keppoch, Glengarry, and Glencoe. Your powers will be sufficient for the purpose. I hope your soldiers will not embarrass the government with prisoners." Lochiel, Keppoch and Glengarry had acted in time. All the hate of the Campbells and all the administrative zeal of the Master of Stair were turned upon Glencoe. King William signed his sentence without reading it, Burnet asserts, and amid the mass of papers which were presented to him every day. He did not, doubtless, understand its purport. "It is a charitable duty," wrote the Master of Stair, "to destroy this nest of robbers."

On the 1st of February, 1692, a detachment of Argyle's regiment entered the territory of Glencoe, peacefully, and as if animated by the most friendly intentions. "It would be better to do nothing in the matter than to do it unsuccessfully," the Master of Stair had said. "Since the thing is resolved on, it must be executed secretly and suddenly." The commander of the small body, Captain Campbell, commonly called Glenlyon from the name of his estate, had a niece married to the second son of Glencoe. The soldiers were well received and housed among the cottages.

They passed twelve days there waiting for the time when Lieutenant-colonel Hamilton should have occupied the defiles of the mountains. The 13th of February had been fixed on as the fatal day; the Highlanders had felt some uneasiness, but their guests had reassured them, "If there was any danger," Glenlyon had said to the chiefs eldest son, "should I not have warned your brother and his wife?" At the appointed hour Hamilton had not yet arrived; nevertheless the massacre began. Under every roof, beside every hearth, Glenlyon's soldiers shot down their hosts, men, women and children; the Master of Stair's orders had allowed them to spare old men above seventy. In their bloody intoxication the troops gave no quarter; the aged Glencoe perished among the first. His wife, assassinated beside him, was stripped of her jewelry, and did not expire till the next day. At every door was seen a corpse. When Hamilton appeared at the head of his troops, they plundered all the houses, and long lines of cattle were driven down the mountain passes by the light of the flames which were consuming the villages.

God does not suffer crime, though cleverly conceived, to gain a complete triumph. The passes had not been guarded; the murderers had not all arrived in time, and a large number of the Macdonalds of Glencoe succeeded in escaping, at the cost of new sufferings—exposed to hunger, cold, and unceasing dangers. They repaired to the midst of their mountains, above their ruined houses and their blood stained hearths. The cry of their calamity mounted slowly to Heaven. The Jacobites assisted in spreading it abroad: they had eagerly seized this weapon against King William. When the latter, far away and imperfectly informed, wished to open an inquiry into the authors of the crime, so many and so important persons were compromised in it, that the Master of Stair alone was removed for a time from public life. The massacre of Glencoe has remained a dark stain on the reign of William III., a sad contrast to the leniency and humanity which usually characterized his government.

Hardly had the king left England before the nation, as well as Queen Mary, was a prey to serious uneasiness. Louvois had died suddenly on the 17th of July, 1691, without Louis XIV., with whom his influence had been decreasing, appearing particularly distressed at his loss. "Tell the King of England that I have lost a good minister," was the answer he had made to King James's condolences, "but that his affairs and mine will fare none the worse for it."