The version I learned gave verse three as:

I threw her a line and I took her in tow
Yard arm to yard arm I'd tow and we'd go
I towed her that night and through the next day
I towed her all round Trafalgar bay

In a neat little harbour she soon had me moored
And like a good sailor this jack went aboard
She laid in my fore sail me mainsail and all
With a slip of her hand made my reefs take a fall

and a penultimate verse

Here’s a curse on the girl with the dark wavy hair
Here’s luck to the girl who taught jack how to swear
He all in for refit laid up in dry docks
New mainsail and rigging new tackle and blocks.

HTML line breaks added --JoeClone, 24-Dec-01.