My friend has a English single barrel percussion shotgun marked "Fredrick Sharp, Arundel" on the barrel. It's in fine condition with London proofs on the under side of the barrel. We would like to know about Mr. Sharp and when he was making guns. Details of the gun are no engraving, back action lock, patent breech, brown barrel, ebony ram rod, light colored walnut stock and the mountings are ether light colored brass or perhaps German sliver. Thanks.