Seymour continued as governor of the united colonies until 1869, but after the British North America Act joined three colonies (New Brunswick, Nova Scotia, and the Province of Canada) into the Canadian Confederation in 1867, it seemed increasingly only a matter of time before Vancouver Island and British Columbia would negotiate terms of union. Major players in the Confederation League such as Amor De Cosmos, Robert Beaven, and John Robson pushed for union primarily as a way of advancing both the economic health of the region, as well as increased democratic reform through truly representative and responsible government. In this effort, they were supported and aided by Canadian officials, especially Sir Samuel Tilley, a Father of Confederation and Minister of Customs in the government of Prime Minister Sir John A. Macdonald. Seymour, ill and beset by protests that he was dragging in his feet in completing negotiations for the HBC's territory, was facing the end of his term, and Macdonald was pressing London to replace him with Sir Anthony Musgrave, outgoing governor of the Colony of Newfoundland. Before the appointment could be finalised, however, Seymour died.