The signature is very similar to the photograph of an "H. Albright" signature in "Kentucky Rifle Patchboxes, Volume II." We are used to seeing the earlier carved Albright rifles from his Lancaster days, and those guns had heavier, triangular butts. He also worked in Ohio for a period of time before returning to Lancaster, PA, where he died in the 1840s. This rifle has the separated side leaves on the patchbox, and lack of stock carving, of a later flint era rifle. The graceful curvature of the butt stock and slim forestock look more like the work of Albrights in Ohio, and perhaps Henry worked with/near them when in Ohio for a while.
The gun appears rather heavily cleaned, but from the photos, I think it is an original rifle with a fine patchbox. If not by Henry, then probably his hardware restocked by a relative in Ohio, but it could well be a later rifle by Henry with Ohio influences, i.e. slimer with curved comb. Regardless, it appears original to me, and I'd grab it in a heart-beat at 800 and think I stole it. Geeeze, the lock itself is probably worth $400.
Shelby Gallien