I'd give a rough transcription of the tune but it's in Eb and I'd struggle.

It's actually online at www.loc.gov/resource/sm1845

Music for a Nation-American Sheet Music 1820-1860 Library of Congress (although it's a bit out of place with the dating!)

The group I'm in 'Spare Hands' sing the trawlermen version, but we decided to use the RRV tune as we already knew it and the harmonies go nicely on the chorus.