As early as 1847, it was believed that Franklin's forces were likely icebound. The British Admiralty devised a three-pronged rescue effort to address the three most likely escape routes for Franklin – eastwards via
Lancaster Sound, southwards via the
Mackenzie River (to the settlement of the
Hudson's Bay Company fur traders), or westwards via the
Bering Strait. Sir John Richardson, who had participated in earlier
Arctic expeditions with Franklin himself, took the objective of the Mackenzie River, tracing the coast between the Mackenzie and Coppermine rivers, as well as the shores of
Victoria Island and the
Wollaston Peninsula, then known as Victoria Land and Wollaston Lands, in an overland expedition. Assuming the existence of an unknown but likely passage between these lands, it would have been the most direct route of travel consistent with Franklin's original exploration orders. John Rae of the Hudson's Bay Company was attached to this effort. Rae had 15 years of experience in the region and regarded the indigenous people with uncommon respect. It was planned that the expedition would extend their search by wintering in the area of
Great Bear Lake. Recent seasons of hunting in
Rupert's Land (as the Hudson's Bay Company area was called) had been poor, so additional provisions were transported to the area in 1847, prior to Richardson's departure. These consisted of over of canned
pemmican. Four half-ton boats were constructed (at
Portsmouth Dock Yard and Camper's Yard at
Gosport) for the river navigation, about each, but designed so that the two smaller boats nest inside the two larger boats during shipping. Five seamen and fifteen
sappers and miners were selected as the expedition crew, many also skilled in carpentry, blacksmithing and engineering. The company's men and supplies departed
England on , heading for
Hudson Bay. Ice in the
Hudson Straits delayed the supply and crew landing until September 8, while Richardson completed his preparations in England. The Hudson's Bay Company provided transport of additional supply caches along their proposed route. Workers were deployed to fish and cut firewood in anticipation of the expedition. Richardson and Rae set out from
Liverpool on , landed in
New York on April 10, and reaching
Montreal four days later. Two canoes, crewed mainly by
Iroquois and
Chippewa, delivered Richardson, Rae, and their personal equipment to
Cumberland House on the
Saskatchewan River on June 13. Travelling by canoe and
portage, Richardson and Rae met the advance party at
Methy Portage on June 28, continuing down the
Slave River with them until mid-July, reaching
Fort Resolution on
Great Slave Lake, source of the Mackenzie River, on the 17th. == Reaching the winter encampment ==