Eric, this is, probably the most frustrating "school" of American Longrifle builders. From viewing guns made by Shuler, Verner, "AP", some Weicker, Daub, Hersh, and others you'd swear they were in the same shop using the same stock pattern and dipping into a common box of hardware. The carving details, side opening patchbox, unique patchbox release, long ramrod pipes, extended entry pipe, and short, open nose cap are all frustratingly similar.
And, then just when you think you've seen it all, one shows up with a short entry pipe and "Delaware Daisy" patchbox. Then there's one with relief carving. It's really a shame about the records. They would have gone a long way towards making sense of this group of guns.
All that being said they are one of the most stylish 'schools" of that period, and one of the most easily identified.