The rapids of Niagara, as I once told you, reminded me of a monstrous tiger at play, and threw me into a sort of ecstatic terror; but these rapids of St. Mary suggest quite another idea: as they come fretting and fuming down, curling up their light foam, and wreathing their glancing billows round the opposing rocks, with a sort of passionate self-will, they remind me of an exquisitely beautiful woman in a fit of rage, or of Walter Scott's simile--"one of the Graces possessed by a Fury;"--there is no terror in their anger, only the sense of excitement and loveliness; when it has spent this sudden, transient fit of impatience, the beautiful river resumes all its placid dignity, and holds on its course, deep and wide enough to float a squadron of seventy-fours, and rapid and pellucid as a mountain trout-stream. FORT AND SETTLEMENTS. Here, as everywhere else, I am struck by the difference between the two shores. On the American side there is a settlement of whites, as well as a large village of Chippewas; there is also a mission (I believe of the Methodists), for the conversion of the Indians. The fort, which has been lately strengthened, is merely a strong and high enclosure, surrounded with pickets of cedar-wood; within the stockade are the barracks, and the principal trading store. This fortress is called Fort Brady, after that gallant officer whom I have already mentioned to you. The garrison may be very effective for aught I know, but I never beheld such an unmilitary-looking set. When I was there to-day, the sentinels were lounging up and down in their flannel jackets and shirt sleeves, with muskets thrown over their shoulders--just for all the world like ploughboys going to shoot sparrows; however, they are in keeping with the fortress of cedar-posts, and no doubt both answer their purpose very well. The village is increasing into a town, and the commercial advantages of its situation must raise it ere long to a place of importance.