I'd lean toward a New York origin for this rifle, despite the long tang. It has a number of NY features already pointed out, plus the checkered wrist. With the cheek inlay with initials and the word "Buffalo" below it, I'd be checking census data and county histories in Buffalo, NY circa 1850 and 1860 for someone with "W H W" initials as the probable owner, probably someone with a few bucks. I'd also check the set of New York firearms trade books for makers around Buffalo that did work similar in appearance to this gun. Shelby Gallien