The Lincolnshire version audio is on the Yorkshire Garland website.
The earlier form of the ballad on broadsides is called 'The Effects of Love'. The story is reported as a true one. Both Betsy and the shopkeeper were from Hull and it happened in 1812 if the earliest broadside is to be believed. There were lots of Betsy Watsons in Hull at the time and indeed several William Ellises (the dastardly shopkeeper) See www.yorkshirefolksong.net for a more detailed history of the song, under the title 'The Effects of Love'.