C. Fox Smith composed several poems that have been rendered into songs that would seem to qualify.

Mariquita: click here for lyrics and MP3 sample!

There's also "Admiral Dugout, " "Shipkeeper," and "Mainsail Haul."

The ultimate old fart song might be "The Blow at Witch's Hole" which is somewhere in the Mudcat threads as a song challenge (Methane Sinks Ships).

Cheerily,
Charley Noble