...avalry, dismounted, occupying his trenches, and moved to the rear of the Army of the Cumberland, stretching down the Nickajack; but Johnston detected the movement, and promptly abandoned Marietta and Kenesaw . I expected as much, for, by the earliest dawn of the 3d of July, I was up at a large spy-glass mounted on a tripod, which Colonel Poe, United States Engineers, had at his bivouac close by our camp...