I'd appreciate any help or advice regarding what I understand to be a Kentucky or Pennsylvania "Long Rifle" with a Double Set Trigger. I'll begin by saying that it does not belong to me, but I've been sent photos by the owner. I'm in the UK, and a Long Rifle is not something I come across very often.
Aside from the photos, I can only add what I have discovered for myself, some of which may not be correct. The overall length of the rifle is around 61 inches, with the barrel roughly 45 inches. It has the typical octagonal, small bore barrel, probably somewhere between .45 and .50 inch, which has been 'blued'. It is currently fitted with a caplock percussion mechanism, but is this original? Given the length of the barrel, could this be an older rifle that has been "modernised" at some time, replacing an earlier flintlock mechanism? There are certainly signs of work around the barrel, where the percussion cap is fitted, and damage to the fore-stock that might suggest so.
The stock itself appears to be in much better condition than the rest of the rifle, and probably a replacement The brasswork certainly seems to be unmarked, which seems unlikely for a rifle which otherwise looks to be at least c1850, if not older.
There are some marks on the metalwork, including what looks to be a shield-shaped emblem on the trigger guard. The vestiges of some engraving is just discernible on the lockplate, including what looks to be a standing figure, together with some foliate engraving (or possibly a monogram?) to the rear of the cockscrew mount. There is a simple pinstripe border. Towards the front of the plate is something indistinguishable which may be purely decorative. The name "John Simpson" is engraved into a rectangular brass plate, inset into the top of the barrel - original owner's name or gunsmith?
Any thoughts on how old this might be, how original, and perhaps where it was made ... gratefully received.