That's my understanding, too. Lloyd recorded it himself (it appears on The Bird in the Bush, re-issued as Topic TSCD479), commenting: "It was got from an [Irish] immigrant potato-lifter near Walberswick, but he learnt it in England. Vance Randolph found a version among the Ozark hillfolk, too coarse to publish". That was written long before the Randolph texts were published, of course, and the only set listed in the Roud Index that mentions a date (the 16th of May) is one that he collected. Lloyd was often mysterious about his sources, or named singers no one else knew anything about and who couldn't be traced.