As mentioned above, "THE BOLD FISHERMAN."
THE BOLD FISHERMAN

There was a bold fisherman was outbound from Halifax
To catch the wild codfish and the bold mackeroo,
But when he got to Pimlico, the stormy winds begin to blow,
And his little boat went wibble-wobble and overboard went he.

CHORUS
Twinky-doodle-dum, twinky-doodle-dum.
'Twas a highly interesting song he sung.
Twinky-doodle-dum, twinky-doodle-dum,
Sang the bold fisherman.

He wriggled and he jiggled in the water so briny-o.
He yellowed and he bellowed for help, but in vain.
Then down he did gently glide to the bottom of the silvery tide,
And previous to this he cried, "Farewell, Mary Jane."
CHORUS

His ghost walked at midnight by the bedside of his Mary Jane.
When he told her how dead he was, she said, "I'll go mad.
If my love be so dead," said she, "there is no peace on earth for me,
And I never more will happy be." She went raving mad.
CHORUS

I have no earthly idea where I learned this song. It would have been sometime about 1970 or a bit later. I was astounded to find that Humphrey Bogart begins singing this one at the very end of "African Queen," when he's in the water swimming with Katherine Hepburn. He gets out a line or two before the movie ends. The song has a very upbeat, sprightly tune and rhythm, and when I sing it, I introduce it as the jolliest song about death and insanity I know.
Regards,
Bman