George Spicer and Charlie Bridger, each born in south Kent both sing 'Switzerland' John. As said, this is curious in itself as murderer Dedanies was a Serbian living in barracks at Shorncliffe at the time.

However, if your source sings 'Sicilian', then Sicilian it is! That's the glory of tradition. The same song can manifest itself with slightly altered lyrics and/or melody in different regions.

Reg Hall wrote some notes in 'Ethnic' magazine and commented to me that Spicer's rumpty-tumpty 6/8 tune seems reminiscent of the Music Hall, and I am inclined to agree. As far as I'm aware, the broadside from which it is derived has yet to be located.