The schooner towed by the potent little tug soon passed through, but they were detained by a sloop that made its way very slowly, and Norman had time to look at the vessels in the river, many of them loaded with grain, twenty-five millions of bushels being annually received at this grain port. He also watched with great interest the working of a dredging machine used to take mud out of the river and thus deepen its channel. A great number of carriages and carts awaited the return of the moving bridge, and many, pedestrians were ready to leap upon it as it approached. The bridges are a daily school of patience for the citizens of Chicago. The few days at Mrs. Percy’s Norman enjoyed very much. He took long walks with Emily about the north side of the city, which is pleasantly shaded with trees and adorned with many fine residences. They drove out too with Mrs. Percy on Michigan Avenue, a noble street, with rows of fine houses built of beautiful cream-colored stone, and pretty cottages embowered in shrubbery, fronting on the lake. The railway is laid through the water, at a short distance from the shore, and the interval affords a fine safe place for rowing, sheltered as it is from the sudden storms of the lake. There were a number of pretty row boats rapidly darting to and fro, and young people enjoying the air and exercise on the quiet waters. They returned by Wabash Avenue, adorned with its noble churches. They alighted, and went in to look at the new Methodist church, which was nearly finished. Norman thought it very beautiful. This, and the handsome Presbyterian church at the next corner, are built of the cream-colored stone which gives such a cheerful light aspect to the edifices in Chicago. The Second Presbyterian church is the most antique-looking structure in the city. It is built of a whitish stone, spotted with black, giving it somewhat the aspect of the white marble of St. Paul’s begrimed with the smoke and dust of London. This stone was found on the prairies; the black is a sort of bitumen that exudes from it, and as the quarry is exhausted, this church will be unique as well as antique in its appearance.