Scott and I did find that Richard Shackleton, who managed the Oxford Iron Works across the river in New Jersey had guns stocked at Bethlehem, usually for other men. One of the Day Books has for 1755 March 24 – Stocking &ca a Gun for Fred.r Klein . . . 2. 6. –. This may be the Fredrich Klyn (Powell's English spelling of German name) listed in his ad. This may be a second job (Powell says one rifle already complete well before Feb 1755, and the Day Book lists a Gun (smoothbore) in late March of the same year.
I think this is what you're thinking of, Bob. The
daybook just identifies work done for Shackleton (no indication of what that work is)--but the
ledger, pictured here, which lists transactions by individual's accounts, provides additional information: the charge was for stocking a gun for Frederick Klein.
It is
very likely, as you say, that this was a second instance of work done for Klein. But the coincidence of dates (Powell's draft advertisement and this entry, within a month of each other) makes me wonder.
It could be that the advertisement, if circulated, drew Shackleton back to Bethlehem and, as you suggest, he got
more work done for Klein.
But ... it is also possible that
the older work for Klein simply got entered in these financial ledgers at this time, prompted by Powell's effort to clean up his accounts. I wouldn't draw too much from the different terminology ("gun" in the ledger, "rifle" in Powell's advertisement): sometimes the difference between these types of arms appears precisely and sometimes it isn't. And these financial ledgers aren't transparent. They need to be read carefully with an eye toward how they are being used. Things might be entered into a ledger or daybook later than the work that the entry points to actually occurred.
All that said: if Powell was entering, after the fact, Klein's old charge he would probably enter the other two as well, which he doesn't. So probably Shackleton did come back to Bethlehem, recovered/paid for Klein's rifle, and then got more work done for Klein.