Prescott.

"The province which constitutes the principal territory of Montezuma," (says Cortéz in his letter to Charles the V.,) "is circular, and entirely surrounded by lofty and rugged mountains, and the circumference of it is full seventy leagues. In this plain there are two lakes which nearly occupy the whole of it, as the people use canoes for more than fifty leagues round. One of these lakes is of fresh water, and the other, which is larger, is of salt water. They are divided, on one side, by a small collection of high hills, which stand in the centre of the plain, and they unite in a level strait formed between these hills and the high mountains, which strait is a gun-shot wide, and the people of the cities and other settlements which are in these lakes, communicate together in their canoes by water, without the necessity of going by land. And as this great salt lake ebbs and flows with the tide, as the sea does, in every flood the water flows from it into the other fresh lake as impetuously as if it were a large river, and consequently at the ebb, the fresh lake flows into the salt.