y the confluence of the Mattapony and Pamunkey, which unite at West Point.
Richmond, the objective of the operations of the Army of the Potomac, is on the left bank of the James, at the head of navigation, and by land is distant seventy-five miles from Fortress Monroe.
From Fortress Monroe the advance was made in two columns—General Keyes with the Fourth Corps (divisions of Couch and Smith) formed the left; and General Heintzelman with the Third Corps (divisions of Fitz-John Porter and Hamilton, with Averill's cavalry) and Sedgwick's division of the Second Corps, the right.
At the very outset the roads were found nearly impracticable, the season being unusually wet. No resistance of moment was met on the march; but on the afternoon of the 5th of April the advance of each
Sketch of the lines of Yorktown. column was brought to a halt—the right in front of Yorktown and the left by the enemy's works at Lee's Mill.
These obstructions formed part of the general defensive line of th