just to add to the confusion, Willie Mitchell, butcher of Campbeltown, had a similar song called 'Campbeltown Once More'- I know Pete Shepheard collected it at a Blairgowrie festival in the sixties& he sent me the words a while back- can't find them now, anyway, Pete is the source.
Also, Bob Roberts the Thames barge skipper used to sing 'Swansea town'- again not sure if he ever recorded it...