In James I. Robertson biography of "Stonewall Jackson", he mentions that during the Valley Campaign of 1862 when Jackson won his greatest fame, Jackson had a group of Black Pioneers under the command of a Capt. C.R. Mason. They appearently traveled with his army all during the entire lenght of this campaign building bridges and doing whatever else Pioneers did.
I am wondering if these were not the Black Confederates that were reported with Jacksons column as it passed throught Frederick, Maryland during the Sharpsburg Campaign just 3 months later? Also if these were maybe not the same Black Confederates that Frederick Douglas was speaking about being in the Confederate Army? Both mentioned in the OR's.