"The two English travelers . . . Its popularity can be judged from the existence of more than twenty broadsides naming the tune for singing, but unhappily the music has not been preserved."

Claude M. Simpson: The British Broadside Ballad and its Music. Rutgers University Press, New Brunswick, 1966, pp 782-783.

A footnote adds:

"One ballad sung to 'The Two English Travellers' is printed with meaningless music combining scraps of "Lillibulero": "Romes Doctor". c. 1689, reprinted in [The Pepys Ballads, ed Hyder E. Rollins, 8 Vols 1929-32. (Vol IV, p291).]

Of course, as this work was published over 50 years ago, more recent research may have discovered the tune.

Harry