following up this stream went by a portage to the St. Maurice, and
passing down reached the St. Lawrence _thirty_ leagues, and not
_three_, below the Falls of Saint Louis. The three rivers thus named
inclose or form an island of about the extent described in the
text. This explanation is plausible. The passage amended would read,
"This river _extends near another which_ falls into the great river
St. Lawrence thirty leagues below the falls of St. Louis." We know of
no other way in which the passage can be rationally explained.

49. Rideau, at the mouth of which is Green Island, referred to in the text
below.

50. The fall in the Rideau is thirty-four feet, according to the Edinburgh
Gazetteer of the World. The estimate of Champlain is so far out of the
way that it seems not unlikely that feet were intended instead of
fathoms. _Vide_ Vol. I. pp. 301, 302.

51. The Chaudiere Falls, just above the present city of Ottawa, the
greatest height of which is about forty feet "Arrayed in every
imaginable variety of form, in vast dark masses, in graceful cascades,
or in tumbling spray, they have been well described as a hundred rivers
struggling for a passage. Not the least interesting feature they
present is the Lost Chaudiere, where a large body of water is quietly
sucked down, and disappears underground" _Vide Canada_ by W. H Smith.
Vol. I. p. 120. Also Vol I. p, 120 of this work.

52. The latitude of the Chaudiere Falls is about 45 deg. 27'.

53. Chaudiere Lake, which was only an expansion of the River Ottawa.