through which the lines of exploration upon these occasions passed, lies for the most part north of latitude 59°, and extends from the coast to Hudson bay, westward to Lake Athabaska, comprising an area of not less than two hundred thousand square miles. The work of the party embraced a survey of the north shore of Lake Athabaska, Chipman, Cochrane, Telzoa or Dubawnt, Thlewiaza, Kazan and Ferguson rivers, in whole or in part, Chesterfield inlet, and the shore of Hudson bay from Chesterfield inlet to Churchill, as well as a line overland in winter, from Churchill to York Factory, and another from Churchill to Split lake. [Illustration: Portage near Long Spruce rapids, Nelson river.] The distance travelled in 1893 was three thousand two hundred miles, one thousand six hundred and fifty of which had not been previously surveyed or reported on in any way. The whole distance of six hundred miles from Churchill to Lake Winnipeg was covered on snowshoes. During the trip of the following year Mr. Tyrrell travelled two thousand nine hundred miles, one thousand seven hundred and fifty by canoe and seven hundred and twenty-five on snowshoes, most of this distance being through unexplored country. Jas. W. Tyrrell, C.E., D.L.S., who formed part of this expedition, subsequently published a popular account of the trip of three thousand two hundred miles in a book entitled “Across the Sub-Arctics of Canada.” During the summer of 1896 Mr. Tyrrell, travelling by canoe, made a survey of the northeastern portion of the old district of Saskatchewan and the adjacent parts of the then district of Keewatin, since annexed to Manitoba, the territory covered comprising an area of rather more than twenty-five thousand square miles, lying between north latitude 50° 40′ and 56°, and west longitude 97° 20′ and 122° 30′. James Macintosh Bell, F.R.G.S., of the Geological Survey of Canada, made a geological reconnaissance of the north arm of Great Slave lake in 1899, wintered at Fort Resolution, and in 1900, accompanied by Mr. Charles Camsell, travelled to Great Bear lake, made a geological exploration of its northern shores, and returned by a chain of lakes to the north arm of Great Slave lake, proceeding to Edmonton the same winter.