1847-50—Sir John Richardson and Dr. Rae, overland, and along the coast in boats from the mouth of the Mackenzie to that of the Coppermine.
1848-50—Captain Thomas Moore, of H.M.S. Plover, and Captain Henry Kellett, of H.M.S. Herald, and Robert Shedden, in yacht Nancy Dawson, to Bering sea.
1848-49—Captain Sir James Clark Ross, of H.M.S. Enterprise, and Captain E. J. Bird, of H.M.S. Investigator, to Lancaster sound.
1849-50—James Saunders, Master of H.M.S. North Star, to Wolstenholme sound and Ponds inlet.
1849—Dr. R. A. Goodsir, in the Advice, whaler, to Baffin bay.
1849—Lieutenant W. J. S. Pullen, of H.M.S. Herald, boat voyage from Bering strait to the Mackenzie.
1850-51—Lieutenant De Haven, of United States navy, in the Advance; S. P. Griffin, of the United States navy, in the Rescue; Captain Horatio Austin, of H.M.S. Resolute; Captain Ommaney, of H.M.S. Assistance; William Penny, Master of the Lady Franklin, under Admiralty orders; Alexander Stewart, Master of the Sophia, under Admiralty orders; Rear-Admiral Sir John Ross, in the Felix yacht, fitted at the expense of the Hudson’s Bay Company, all to Lancaster sound.
1850—Captain C. C. Forsyth, R.N., commanding the Prince Albert, belonging to Lady Franklin, to Regent inlet.
1850-54—Commander Robert M’Clure, of H.M.S. Investigator, to Bering strait, Banks island and Lancaster sound. The crew abandoned the ship, and by walking over the ice to Beechey island made the northern northwest passage.
1850-55—Captain Richard Collison, C.B., of H.M.S. Enterprise, to Bering strait, Banks island, and along the continental channel to Cambridge bay, in Victoria island, near King William island.