I got the lyrics and tune from a radio broadcast. I'm missing a great deal of information, and hope someone can help.

Title?
Any known recordings?
Old song or new? Author?
See the purple bits in the song - am I close?
Any other information?

Oh the southern ocean is a lonely place
Where the storms are many and the shelter's scarce
Down upon the southern ocean sailing
Down below Cape Horn
On the restless water and the troublin' skies
You can see that mollymauk(molly-morg) wheel and fly
Down upon the southern ocean sailing
Down below Cape Horn

Won't you ride the wind and go, white seabird
Won't you ride the wind and go, molly-morg
Down upon the southern ocean sailing
Down below Cape Horn

See the molly-morg floatin' on his wide white wings
And lord, what a lonely song he sings
And he's got no compass and he's got no gear
And there's none can tell ya how the molly-morgs steer

He's the ghost of a sailor-man as I've heard say
Who's body sank, and his soul flew away
And he's got no haven and he's got no home
He's bound evermore for to wheel and roam

When I gets too weary (weedy) for to sail no more
Let my bones sink to the bottom (better___) far away from shore
You can cast me loose and leave me driftin' free
And I'll keep that big bird company