Bachelder's "Army of the Potomac." : During the "seven days' fight" before Richmond, probably one of the most thrilling, picturesque and interesting spectacles to an observer, was the fording of Bear Creek by the great supply trains of the Army of the Potomac. ... Accurate sketches of the locality, and minute notes of the scenes of that day, were made by the successful artist Col. Jno. B. Bachelder, ...