[ Autographs ] (SLAVES WORKING ON CONFEDERATE FORTIFICATIONS) A partly printed D.S. 1p.oblong 8vo., Richmond, Va., Mar. 10, 1864, a receipt from the Engineering Department of the Army of Northern Virginia, certifying that the slave "John" , property of W.A. Staples,was taken for the purpose of laboring on the Confederate fortifications in the vicinity of Richmond. Very good to fine.