The Welland Canal is 30 miles long. It has 27 locks, surmounting a rise of 350 feet; is 564 feet above sea level at Lake Erie, and about one thousand miles from the sea, by way of Montreal, Quebec and Gulf of St. Lawrence. The locks admit vessels 142 feet long by 26 feet beam and 10 feet draught. On the several sections of rapids between Prescott and Montreal the St. Lawrence Canals admit vessels 184 feet long, 44½ feet beam, and nine feet draught. But all craft passing from Montreal, the head of ocean navigation, nearly 600 miles from the sea, are limited to the size of the Welland locks. The Rideau canal, to connect the eastern outflow of Lake Ontario, at Kingston, at the head of the St. Lawrence, with the River Ottawa, and the navigation from Montreal, at a point where stands the city of Ottawa, overcomes 293 feet of rise, and is 126½ miles long. The locks are 134 by 33 feet, and 60 inches deep, on the sill. This with some minor sections of canal on the River Ottawa, was intended to serve a strategical purpose in the defences of Canada. It was begun in 1826, and finished so far as for a steamer to pass through, in 1832. Its cost, $3,860,000, was defrayed by the Imperial Government. It is frequently out of repair, and is not now available for the main object of its construction. The St. Lawrence Canals and the Grand Trunk Railway running parallel with them, are available for defensive purposes, yet so openly exposed to hostile incursions, if such should ever threaten them, as to be elements of strategical weakness as well as lines of transport for conveyance of troops and munitions of war. But in the interests of peace they are works of unspeakable benefit to Canada, as also to the western United States. For eight or ten days previous to the day of the Fenian invasion, June 1st, 1866, American vessels had nearly all disappeared from the Welland canal, the ship-owners, merchants, forwarders and insurers of Chicago and Milwaukee, the great commercial ports on Lake Michigan; and of Detroit. Cleveland and other places in the west, declined to charter vessels or risk freights on passage through the Welland canal. They knew that its capture and obstruction formed one of the earliest acts intended against Canada in the scheme of Fenian invasion. Except an occasional empty vessel, bound up, none bearing a United States flag passed through the Welland locks, until two weeks after O’Neil returned to the American side of the Niagara river. The steamers of the Northern Transportation Company, plying between Cleveland on Lake Erie, and Rochester, and Oswego on Lake Ontario, continued to run.