That the climate of the Atlantic coast of the United States and the British provinces was such as was favorable to the present Arctic dwellers is held to be shown by such evidences as tusks of the walrus found in phosphate beds in South Carolina. Rude implements found in the interglacial Jersey drift have been held by C. C. Abbott to have been associated with a people of the Eskimo stock, and some have noted that palæolithic implements found in Pennsylvania closely resemble the work of the modern Eskimos (_Amer. Antiquarian_, i. 10).[685] Dall remarks upon implements of Innuit origin being found four hundred miles south of the present range of the Eskimos of the northwest coast (_Contributions to Amer. Ethnology_, i. p. 98). Charlevoix says that Eskimos were occasionally seen in Newfoundland in the beginning of the last century; and ethnologists recognize to-day the same stock in the Eskimos of Labrador and Greenland. [Illustration: HINRIK RINK. After a likeness given by Nordenskjöld in his _Exped. till Grönland_, p. 121.] The best authority on the Eskimos is generally held to be Hinrich Rink, and he contends that they formerly occupied the interior of the continent, and have been pressed north and across Behring’s Straits.[686] W. H. Dall holds similar views.[687] C. R. Markham, who dates their first appearance in Greenland in 1349, contends, on the other hand, that they came from the west (Siberia) along the polar regions (Wrangell Land), and drove out the Norse settlers in Greenland.[688] The most active of the later students of the Eskimos is Dr. Franz Boas, now of New York, who has discussed their tribal boundaries.[689]