Y'know, I think that the tune is on Ed Trickett's first recording, The Telling Takes Me Home, on Folk Legacy. I'll check in a minute. I'm sure I heard Ed sing it, and it was on the same album as Sea Fever.
Now, I knew and loved the poem from when I was too small to know the words and what they meant. It was in the Childrens golden Book of Poetry (with the author listed as Mildred Plew Meigs) and with a lot of wonderful poetry, including my all time favorite, Custard the Cowardly Dragon, by Ogden Nash.
When I heard the tune Ed sang, I didn't like it. It was too major, and the poem to me was always mysterious. So I wrote my own. If any of you are interested in that one, I can post it. It's more modal.
Blessings,
Barbara