On re-examining my earlier comments, I see that I was rather unfair, and not a little grumpy. The errors in the DT file (there aren't actually many) are not, I now realise, the result of any lack of understanding but of a failure to proof-read the results of an OCR scan; and the only thing that's really wrong with the text from the "French Folksongs" site is the assignment of the wrong gender to the sea. Record straightened, I hope.

The only version I've heard sung was from Quebec, and a fine one it was, too. It began

Dans les prisons de Londres (x4)
Y'avait un prisonnier, gai faluron falurette!
Y'avait un prisonnier, gai faluron dondé!