There's no tune direction on the broadside "Tarpauling Jacket" (Harding B 25(1883) on the Bodley Ballads website. The song is probably 100 years after Benbow's time.
It may take a couple of weeks before I get a copy of the tune that S. P. Bayard said (Dance to the Fiddle, March to the Fife, #620) was probably the original version (1742) of "Rosin the Beau". I've had an offer to send it by s-mail from Scotland, but am still hopeing someone will do it in ABC for me.