What is the history of a Vulcan Arms shotgun?

Vulcan: Trade name used by the H. & D. Folsom Arms Company on firearms made for the Edward K. Tryon Company of Philadelphia, Pennsylvania. Folsom was a retail/wholesale operation in NYC and the gun would have been manufactured either by Crescent Firearms, Norwich, CT, or by one of several Belgian companies, around 1900. If it is a boxlock with fluid steel barrels, it could be a $200+ shooter (if approved by an experienced gunsmith). If it has side hammers and damascus barrels, it should be a mantle decoration for $125-$150.