This policy, relaxed by Chief Factor George Spence (1747-1752), was strictly enforced by Chief Factor Joseph Isbister when he returned to the fort in 1752. This sudden removal of access to Fort Albany and Henley House angered Wappisis, a Cree man influential over the indigenous people of the area, and in December 1754 he and a few others destroyed Henley House, killing the five HBC men there and raiding the stores, threatening death to anyone that told the Company people that they had done it. Wappisis went to Albany in May 1755 to trade and attempted to blame "French Indians" on the destruction of Henley House. Isbister heard in June from another indigenous person that Wappisis had done it, and Isbister hanged Wappisis and his two sons on June 21, 1755. The employees at Moose and Albany were concerned following the destruction of Henley House, since this was the first such incident of indigenous violence in the company's history. Henley House was re-established under Chief Factor Humphrey Marten by 1768. In 1777, Gloucester House was built 243 miles upriver from Henley House and in 1786, Osnaburgh House was built at the outflow of Lake St. Joseph. This westward expansion significantly increased the trade of Fort Albany. In 1793, the Governor of Albany Fort established posts on the Rainy River and Winnipeg River. Posts supplied from the HBC-run Fort Albany competed with North West Company men from Lake Superior and even HBC posts supplied from York Factory, until the union of the two companies in 1821. Fort Albany was the headquarters of the Albany District of the Hudson's Bay Company, which, as of 1830, bordered Severn District to its northwest, Moose District to its southeast, the far western reaches of Upper Canada to its south, Lac La Pluie District to its southwest, and Winnipeg District to its west. The east-flowing Albany River drew furs from as far west as Lake St. Joseph. From there a portage ran west to Lac Seul, the English River, the Winnipeg River and beyond. A north-flowing branch, the Kenogami River led upstream toward Lake Superior at Wawa, Ontario and another branch, the Ogoki River led toward Lake Nipigon. Following the 1821 merger of HBC with the North West Company, Albany District thrived, recovering from the decline in trade caused by competition while the supply of fur-bearing animals dwindled. In order to curb the extinction of fur-bearing