The earliest extant version is printed in Lord Anson's garland c1757 and in that Nancy is from London but by about 1790 broadsides were putting her from Yarmouth. Of the Hammond/Gardiner Ms versions only Elliott's Dorset version gives London. All the others are Yarmouth. Overall London and Yarmouth are pretty evenly distributed and occasionally oral tradition gives us Weymouth and Plymouth. Laments rarely have much of a narrative and are easily fragmented.