CDNOW also has a sound sample here. Funny thing: I got to this page through a link from AMG but I wasn't able to find it using CDNOW'S own search engine. Hmm.

Anyway, I transcribed what I could from the two sound samples. Unfortunately, even with the additional lyrics, putting them into Google didn't come up with anything more. I've put the doubtful parts in Italics (and highly doubtful they are, too).

DON'T FORGET YOUR OLD SHIPMATE
(Traditional)

Safe and sound at home again. Let the waters roar, Jack.
Safe and sound at home again. Let the waters roar, Jack.

CHO: Long we tossed on the rolling main. Now we're safe ashore, Jack.
Don't forget your old shipmate. Folly rolly rolly rolly rye doe.

Since we sailed from Plymouth Sound before ye's gone or nigh (?), Jack,
Was there ever chummies now, such as you and I, Jack? CHO.

We have worked the selfsame gun. Wad erect a vision (?)
Sponger I and loader you, through the whole commission. CHO.

[As sung by Jerry Bryant & Starboard Mess on "Roast Beef of Old England," Essay CD #5001, 2000.]

[p.s. I don't know what a sponger is, but I'm pretty sure that's what he sings.]