25 (p. 75).--The Ottawa and St. Lawrence Rivers have many and often dangerous rapids; but both rivers are now rendered navigable by canals around the rapids. The Chaudière Falls above Ottawa, and the Lachine Rapids above Montreal, are the most noted of these obstructions. In the St. Lawrence River are 30 miles of rapids. The elevation between Lake Ontario and tidewater is 240 feet. The name "Rivière des Prairies" was at first applied to the Ottawa River (see vol. ii., _note_ 53); but it is now restricted to the channel that separates Isle Jésus from the island of Montreal. 26 (p. 81).--Simon Baron was one of the Jesuit donnés. Sulte says (_Can.-Français_, vol. ii., p. 53): "He had lived at Chibou, Cape Breton Island, about 1631, and had there acquired some surgical knowledge. In 1634, he was in the service of the Jesuits, and accompanied the missionaries to the Huron country, whence he returned in 1637. He is mentioned at Three Rivers in 1637, 1658, and 1664." During the epidemic of 1637, Baron acquired renown through his facility in handling the lancet. 27 (p. 85).--Concerning La Rochelle, see vol. v., _note_ 60. 28 (p. 91).--For location of Toanché, see vol. v., _note_ 61. 29 (p. 99).--Jean Nicolet, a native of Cherbourg, France, came to Quebec in 1618, probably at the age of about 20 years. Like Marsolet, Brulé, and others, he was sent by Champlain to live among the Indians, that he might acquire a knowledge of the country, of the natives, and of their language. For this purpose, Nicolet went (1620) to the Algonkins of Allumettes Island, where he remained two years; while among this tribe, he accompanied a large body of their warriors to the Iroquois country, in order to arrange a treaty of peace--an enterprise successfully accomplished. He then spent some nine years among the Nipissings, during which time he wrote an account of these savages, their customs, etc., as Le Jeune informs us in the _Relation_ for 1636.