G'day Joe,"Bob, are you thinking of A Sailor's Yarn"?"
No ... A Nautical Yarn starts:
I'll sing of a captain who's well known to fame,
An able (or A naval ..) commander, Bill Jinks was his name.
He sailed where the Murray's clear water did flow,
Did this freshwater shellback, with his Yo-Heave-I-O!
This goes to either the tune of Willikins and his Dinah (aka Sweet Betsy From Pike in the US or Dinki Di! in Australian military circles) or a lugubrious minor tune name The Dreadnaught. I'll see what is in the file, at home.
Regards,
Bob Bolton