You may be correct. As a matter of fact, it may well be a restock. No matter, we need it for comparison to others.
Incidentally, as has been discussed many times, there was English Walnut and European wood here in America. It was used as ballast in the wooden ships then sometimes offloaded here and replaced with rum and America's plunder for the return voyage.
Recent scholarly research establishes that some if it was used for roof sub-structure in extant homes in New Orleans. Other similar wood has surfaced in Wilmington, DE, region. Perhaps an enterprising gunsmith or two got hold of some by moonlight and saved a few bucks on some guns, too. Just a thought, and not original with me.