I was able to transcribe this much from a sound sample:

I bought him a flask of the finest malt whiskey
To see if it would raise his courage once more.
He drank it straight down. So softly he kissed me.
Then he rolled over to sleep and to snore.

Johnny, my man, come throw your leg over me.
Why do you lie with your face to the wall?
It's many's the time you played the wild rover.
Tonight you won't play the wild rover at all.