The patchbox shape with solid surround and lid, single trigger, and short forestock grip area all look like New York details. I looked in Swinney's "New York State Firearms Trade" and did not find the name. There was a James Holland working in Hamilton, Ontario, Canada in the 1860s, i.e., percussion era, but it may indicate the gun has Canadian roots, if we cannot find it in or near New York.
The 2-piece patchbox construction is a lot like J.M. Caswell's of New York.
Shelby Gallien