Slightly off topic but important all the same. Such an early printing of a traditional ballad in America is new to me, if we put a rough date of say 1750 on it, which seems reasonable. This begs the question how much more material of a similar nature is/was extant? If anywhere in North America was likely to come up with such material one would immediately think of Boston, but maybe there were other outlets as well. The only early broadside ballads I've seen printed in America are political ones relating to the War of Independence.

I have an ulterior motive here apart from the general interest: The earliest/fullest versions of Bramble Briar were found in America, (Thompson) the earliest in New England. Could it be there was a version printed in New England? Do printers' catalogues exist, like those of the Diceys?