When Pierre Lapierre left Chloe Elliston's school after the completion of the buildings, he proceeded at once to his own rendezvous on Lac du Mort.

This shrewdly chosen stronghold was situated on a high, jutting point that rose abruptly from the waters of the inland lake, which surrounded it upon three sides. The land side was protected by an enormous black spruce swamp. This headland terminated in a small, rock-rimmed plateau, perhaps three acres in extent, and was so situated as to be practically impregnable against the attack of an ordinary force; the rim-rocks forming a natural barricade which reduced the necessity for artificial fortification to a minimum. Across the neck of the tiny peninsula, Lapierre had thrown a strong stockade of logs, and from the lake access was had only by means of a narrow, one-man trail that slanted and twisted among the rocks of the precipitous cliff side.

The plateau itself was sparsely covered with a growth of stunted spruce and banskian, which served as a screen both for the stockade and the long, low, fort-like building of logs, which was Lapierre's main cache for the storing of fur, goods of barter, and contraband whiskey. The fort was provisioned to withstand a siege, and it was there that the crafty quarter-breed had succeeded in storing two hundred Mauser rifles and many cases of ammunition. Among Lapierre's followers it was known as the "Bastile du Mort." A safe haven of refuge for the hard-pressed, and, in event of necessity, the one place in all the North where they might hope indefinitely to defy their enemies.

The secret of this fort had been well guarded, and outside of Lapierre's organized band, but one man knew its location—and few even guessed its existence. There were vague rumours about the Hudson Bay posts, and in the barracks of the Mounted, that Lapierre maintained such a fort, but its location was accredited to one of the numerous islands of the extreme western arm of Great Slave Lake.

Bob MacNair knew of the fort, and the rifles, and the whiskey. He knew, also, that Lapierre did not know that he knew, and therein, at the proper time, would lie his advantage. The Hudson Bay Company had no vital interest in verifying the rumour, nor had the men of the Mounted, for as yet Lapierre had succeeded in avoiding suspicion except in the minds of a very few. And these few, realizing that if Lapierre was an outlaw, he was by far the shrewdest and most dangerous outlaw with whom they had ever been called upon to deal, were very careful to keep their suspicions to themselves, until such time as they could catch him with the goods—after that would come the business of tracking him to his lair. And they knew to a certainty that the men would not be wanting who could do this—no matter how shrewdly that lair was concealed.

Upon arriving at Lac du Mort, Lapierre ordered the canoe-men to load the fur, proceed at once to the mouth of Slave River, transfer it to the scows, and immediately start upon the track-line journey to Athabasca Landing. His own canoe he loaded with rifles and ammunition, and returned to the Yellow Knife. It was then he learned that Chloe had gone to Snare Lake, and while he little relished an incursion into MacNair's domain, he secreted the rifles in the store-house and set out forthwith to overtake her. Despite the fact that he knew the girl to be strongly prejudiced against MacNair, Lapierre had no wish for her to see his colony in its normal condition of peace and prosperity. And so, pushing his canoemen to the limit of their endurance, he overtook her as she talked with MacNair by the side of his mother's grave.

Creeping noiselessly through the scrub to the very edge of the tiny clearing, Lapierre satisfied himself that MacNair was unattended by his Indians. The man's back was turned toward him, and the quarter-breed noticed that, as he talked, he leaned upon his rifle. It was a chance in a thousand. Never before had he caught MacNair unprepared—and the man's blood would be upon his own head. Drawing the revolver from its holster, he timed his movements to the fraction of a second; and deliberately snapped a twig, MacNair whirled like a flash, and Lapierre fired. His bullet went an inch too high, and when Chloe insisted upon carrying the wounded man to the school, Lapierre could but feebly protest.

The journey down the Yellow Knife was a nightmare for the quarter-breed, who momentarily expected an attack from MacNair's Indians. Upon their safe arrival, however, his black eyes glittered wickedly—at last MacNair was his. Fate had played directly into his hands. He knew the attack was inevitable, and during the excitement—well, LeFroy could be trusted to attend to MacNair. With the rifles in the storehouse, MacNair's Indians would be beaten back, and in the event of an investigation by the Mounted, the responsibility would be laid at MacNair's door. But of that MacNair would never know, for MacNair would have passed beyond.

Knowing that the vengeance of MacNair's Indians would not be long delayed, Lapierre determined to be well away from the Yellow Knife when the attack came. However, he had no wish to leave without first assuring himself that the shooting of MacNair stood justified in the eyes of the girl, and to that end he had called upon her in her cottage.

Then it was that chance seemed to offer a safe and certain means of putting MacNair away, and he dropped the poisonous antiseptic tablets into the medicine, only to have his plan frustrated by the unexpected presence of Big Lena. He was not sure that the woman had seen his action. But he took no chances, and with an apparent awkward movement of his hat, destroyed the evidence, sought out LeFroy, who had already been warned of the impending attack, and ordered him to place three or four of his most dependable Indians in the cottage, with instructions not only to protect Chloe, but to kill MacNair.