...brigade. General Gregg's Division, having crossed the Potomac at Edwards' Ferry, in rear of our army, passed through Frederick, and, on the afternoon of July 1st, was at Hanover Junction, and reached Gettysburg on the morning of the 2d, taking position on the right of our line. On the 3d, during that terrific fire of artillery, which preceded the gallant but unsuccessful assault of Pickett's Division on o...