From Hampton roads to James river, entering to the northward of Newport News, middle ground, 22-24.8. From Hampton roads to James river, entering to the southward of Newport News, middle ground, 27-29.8. From abreast the tail of York spit, up to Yorktown, 33-35.8. Elizabeth river, between Norfolk and navy yard, 25.5-28.3. When we leave the tide-water rivers for the interior navigable streams, Virginia has a vast advantage. New York has no such rivers above tide, but Virginia has the Ohio for hundreds of miles, with its tributaries, the Kanawha, Guyandotte, and Big Sandy. It is true, New York has several of the great lakes, and the vast advantage of connection with them through her great canal. But, in the absence of slavery, the canal projected by Washington (preceding that of New York) would have connected, through Virginia, the Chesapeake bay with the Ohio river. The James river, flowing into the Chesapeake, cuts the Blue Mountains, and the Kanawha, a confluent of the Ohio, cuts the Alleghany; thus opening an easy and practicable route for a great canal from the eastern to the western waters. The valley of the lakes, with which New York is connected by her canal, has an area of 335,515 square miles. The valley of the Mississippi, with which the Chesapeake would long since, in the absence of slavery, have been connected by the Virginia canal, has an area of 1,226,600 square miles. The shore line of the Mississippi and its tributaries, above tide water, is 35,644 miles. (Page 35 Compend. Census of 1850.) Our shore line of the lakes is 3,620 miles, including bays, sounds, and islands; and that of the British, 2,629. (Ib. 35.) The connection of the lakes with the Ohio and Mississippi would be the same for both States, the one being from the lakes to these rivers, and the other from the rivers to the lakes. The location of Virginia is more central than that of New York, and Virginia runs farther west by several hundred miles. We are so accustomed to look at the connection of New York with the West by her canal, and Virginia with no such union, that it is difficult to realize the great change if Virginia had been connected by her progressing work with the Ohio and Mississippi, and thence, by the present canals, with the lakes.