Quite possible that S H Co was Shapleigh Hardware Company of St. Louis. A large wholesale/retail business operating around 1900. If Ed's shotgun was made for them, the actual manufacturer was probably Crescent Arms, Norwich, Ct. or one of many Belgian companies. Can you describe how the breech opens (I'm assuming it is a breech-loading gun, not a muzzle loader) and are there any marks visible when the action is open or on the bottom of the barrel when the forestock is removed? Even if this isn't a Shapleigh gun, it is still most likely a basic utility shotgun that has much more value as a piece of family history than as a firearm.