Has anyone here ever heard of the Sulphur River Armory from Naples Texas ?
I have a model 1874 Sharps rifle that is so stamped on the side plates.  On the barrel is stamped Buffalo Express and 
calibre 45 2 4/10

So far its a mystery. It appears to be an original rebuild but I lack the experience to tell for certain. 
I contacted the city of Naples , Tx and was told they have no records of any such business ever existing there.
My Son found a historical mention of it from the depression era but nothing solid.
If anyone has any first hand knowledge of it I would appreciate hearing about it.
Thanks

Many years ago there was a company in TX that sold a set of parts castings for a ‘74 Sharps action.  That name sounds familiar as does the city you mentioned. They used to advertise in the BPCR News. I no longer have any back issues or I’d see if I could find an ad.
TK