And one more reference from the above:

//
We hear the mate sing out in a pleasant, cheery voice: "Now, then, boys, heave away on the windlass breaks; strike a light, it's duller than an old graveyard." And the chantyman, in an advanced stage of hilarious intoxication, gay as a skylark, sails into song:

"In eighteen hundred and forty-six,
I found myself in the hell of a fix,
A-working on the railway, the railway, the railway.
Oh, poor Paddy works on the railway.

"In eighteen hundred and forty-seven,
When Dan O'Connolly went to heaven,
He worked upon the railway, the railway, the railway.
Poor Paddy works on the railway, the railway.

"In eighteen hundred and forty-eight,
I found myself bound for the Golden Gate,
A-working on the railway, the railway.
Oh, poor Paddy works on the railway, the railway.

"In eighteen hundred and forty-nine,
I passed my time in the Black Ball Line,
A-working on the railway, the railway,
I weary on the railway,
Poor Paddy works on the railway, the railway."
//

It's PADDY ON THE RAILWAY at the brake windlass.