Ian, Yes I knew that. What I didn't know was how far back before the Beggar's Opera the tune was current. I was using the opera to give some estimation of the antiquity of the song, to the best of my knowlege.

And thanks to Teribus and Dave Bryant for the link to John Tams. I had always wondered who re-wrote the lyric for the Sharpe's Rifles programs. I've had requests for that version of the song.
Jim