Here are some photos of the rifle.
It is a double barreled hunting rifle. Rather than having the barrels regulated to use a single set of sights, each barrel has its own set. Easier way of approaching sighting a double.
It looks to be in very fine condition.
As I suggested in post two, this piece is a rare one. While muzzleloading rifles were made in Canada during the 19th century, they are not common. Double rifles are rare; if a double was made, it was more likely to be a combination gun.
This rifle has significant value.
As far as Canadian made muzzleloading guns are concerned, most would seem to be rifles, or if a smoothbore barrel was present, combination guns. Canadian made shotguns, either single or double are exceptionally unusual. The gun trades of Birmingham and Belgium just about guaranteed that there was no point in a Canadian gunsmith making shotguns. Almost invariably, if the name of a Canadian gunsmith is on a shotgun, there will be Birmingham proofs on the barrels. I have two gunsmith made doubles; both are 14 pound doubles which I expect were made for market waterfowling. Canadian made muzzleloading pistols are extremely rare. Jones is known to have made Deringer style pistols. I believe Michael Mater of Chippewa made at least one all iron target/hunting pistol. To the best of my knowledge, there is no known specimen of a Canadian made flintlock pistol. Once again, demand was met by production in the UK.