The French also built some small vessels on Navy Island. The reënforcements sent from Venango for the French, during the siege of Fort Niagara by Sir William Johnson, in 1759, were landed on this island. To the east of it there is a large deep basin, formed at the foot of the channel, between Grand and Buckhorn islands. The upper part of this channel being narrow, the basin appears like a bay. In this bay the French burnt and sunk the two vessels, as is supposed, which brought down the Venango reënforcements; hence the name "Burnt Ship Bay." The writer has seen the ribs and timbers of these vessels beneath the water, and caught many fine perch which had their haunts near them. The Niagara frontier was the theater of great activity during the War of 1812. PART II.--GEOLOGY. CHAPTER VI. America the old world--Geologically recent origin of the Falls--Evidence thereof--Captain Williams's surveys for a ship canal--Former extent of Lake Michigan--Its outlet into the Illinois River--The Niagara barrier--How broken through--The birth of Niagara. If Professor Agassiz and Elie De Beaumont are correct in their geological reading, America is the old world rather than the new, and the northern portion of it, stretching from Lake Huron eastward to Labrador and northward toward the Arctic, was the first to be lifted into the genial light of the sun. And Professor Lyell has recourse to the vast stellar spaces for a standard by which to estimate "the interval of time which divides the human epoch from the origin of the coralline limestone over which the Niagara is precipitated at the Falls." "The Alps, the Pyrenees, the Himalayas," he continues, "have not only begun to exist as lofty mountain chains, but the solid materials of which they are composed have been slowly elaborated beneath the sea within the stupendous interval of ages here alluded to." A little more than thirty years ago, Professor Agassiz made a tour to the Upper Lakes with a class of students, for the purpose of giving them practical lessons in geology and other branches of natural science. The day was devoted to outdoor examinations of different localities, and in the evening was given a familiar lecture expository of the day's work. One of the places thus visited was Niagara, and it was the writer's good-fortune to be able to listen to the instructive lecture which followed the examination. Professor Agassiz concurs with other geologists in the opinion that the Falls were once at Lewiston, and one of the most interesting portions of the lecture was his animated description of the retrocession of the Falls, traced step by step back to their present position. From this oral exposition, from other high geological authorities, and from personal observation extending through a quarter of a century, the writer has derived the facts herein presented.