The adjournment of Congress—The rifle “Betsy” is presented to Davy at Philadelphia—Meets Daniel Webster and others at the Fish-House Club—He is given a supply of hunting powder by Mr. Dupont—The fast line to Pittsburg, by rail and canal—Charles Dickens’ notes on the same route—Davy foretells the greatness of the Smoky City and the Keystone State—The voyage down the Ohio............