Very interesting, thanks!

Well, here's the additional and changed verses I padded my interpretation with. Mostly standard chantey fare:

Breast your bars and bend your backs, boys
   Heave me boys together!
Heave and make your spareribs crack, boys
   Heave me boys away
We're homeward bound to New York Bay
Make your port and take your pay

Sing and heave and heave and sing
Heave and make the capstan spring
Tis blow ya winds for New York Town-O
Where them Bowery gals hang round-O

When I was young and in my prime
I courted once a fine-ass dime
But now I'm old and getting grey
They seem to look the other way