At this time Fort William had the proportions of a good-sized village. Its structures were of wood and were of all shapes and sizes. One commodious building near the centre of the fort, fronted by a wide verandah, immediately caught the eye of the visitor. It contained a council-hall, the mercantile parliament-chamber of the Nor'westers. Under the same roof was a great banqueting-hall, in which two hundred persons could be seated. In this hall were wont to gather the notables of the North-West Company, and any guests who were fortunate enough to gain admission. Here, in the heart of the wilderness, there was no stint of food when the long tables were spread. Chefs brought from Montreal prepared savoury viands; the brimming bowl was emptied and too often replenished; and the songs of this deep-throated race of merchantmen pealed to the rafters until revelry almost ended in riot. At one end of the room stood the bust of Simon M'Tavish, placed so that his gaze seemed to rest upon the proprietors and servants of the company he had called into being. About the walls hung numerous portraits—one of the reigning monarch, George III, another of the Prince Regent, a third of Admiral Lord Nelson. Here, too, was a painting of the famous battle of the Nile, and a wonderful map of the fur-bearing country, the work of the intrepid explorer David Thompson.

Simon M'Tavish, Founder of the North-West Company.
From a water-colour drawing in M'Gill University Library.

The unexpected appearance of Lord Selkirk in the vicinity of Fort William found the Nor'westers off their guard and created a great sensation. It was a matter of common knowledge among the Nor'westers that Selkirk was on his way to the Red River with a squad of armed men, but they understood that he would follow the route leading past their fort at Fond du Lac. There is evidence to show that a plot to compass Selkirk's death or seizure had been mooted some weeks before. John Bourke, on the road to Fort William as a prisoner, had overheard a conversation between Alexander Macdonell and several other partners of the North-West Company. This conversation had occurred at night, not far from Rainy Lake. According to the story, Bourke was lying on the ground, seemingly asleep, when the partners, standing by a camp-fire, fell to discussing their recent coup at 'the Forks.' Their talk drifted to the subject of Lord Selkirk's proposed visit to Assiniboia, and Macdonell assured the others that the North-West Company had nothing to fear from Selkirk, and that if extreme measures were necessary Selkirk should be quietly assassinated. 'The half-breeds,' he declared, 'will take him while he is asleep, early in the morning.' Macdonell went so far as to mention the name of a Bois Brûlé who would be willing to bring Lord Selkirk down with his musket, if necessary.

Bourke told to his fellow-prisoners, Patrick Corcoran and Michael Heden, what he had overheard. It thus happened that when Heden now learned that the founder of Assiniboia was actually camping on the Kaministikwia, he became alarmed for his safety. Though a prisoner, he seems to have had some liberty of movement. At any rate, he was able to slip off alone and to launch a small boat. Once afloat, he rowed to the island where Chatelain and his voyageurs had halted on the way to Fort William. The water was boisterous, and Heden had great difficulty in piloting his craft. He gained the island, however, and told Chatelain of his fear that Lord Selkirk might come to harm. Heden returned to the fort, and was there taken to task and roughly handled for his temerity in going to see one of Lord Selkirk's servants.

On August 12 the second section of the contingent arrived with the experienced campaigners. From the moment they raised their tents Lord Selkirk began to show a bold front against the Nor'westers. Captain D'Orsonnens was entrusted on the day of his arrival with a letter from Selkirk to William M'Gillivray, the most prominent partner at Fort William. In this M'Gillivray was asked his reason for holding in custody various persons whose names were given, and was requested to grant their immediate release. M'Gillivray was surprisingly conciliatory. He permitted several of the persons named in the letter to proceed at once to Selkirk's camp, and assured Lord Selkirk that they had never been prisoners. John Bourke and Michael Heden he still retained, because their presence was demanded in the courts at Montreal.

Acting as a justice of the peace, Selkirk now held a court in which he heard evidence from those whom M'Gillivray had surrendered. Before the day was over he had secured sufficient information, as he thought, to justify legal action against certain of the partners at Fort William. He decided to arrest William M'Gillivray first, and sent two men as constables with a warrant against M'Gillivray. On the afternoon of August 13 these officers went down the river to the fort. Along with them went a guard of nine men fully armed. While the guard remained posted without, the constables entered the fort. They found M'Gillivray in his room writing a letter. He read the warrant which they thrust into his hand, and then without comment said that he was prepared to go with them. His only desire was that two partners, Kenneth M'Kenzie and Dr John M'Loughlin, might accompany him to furnish bail. The constables acceded to this request, and the three Nor'westers got into a canoe and were paddled to Point De Meuron.