Fort Frederick: Potomac Outpost By Powell, Allan Books / Paperback History: United States › Maryland ISBN: 0961999500 / Publisher: Allan R Powell, February 1988 Price $14.90 Free Shipping Send to a friend Collectible - Acceptable Signed Signed Copy Collectible - Acceptable. Former Library book. Inscribed by author on title page. Dampstained. (local history, maryland, french and indian war) $14.90 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.