I can't remember where I first heard this song - it might well have been at the Herga in the 60s. But I was always unhappy about the lack of a good ending so I did some searching and found a couple of versions with the following story line (I've changed it a little bit!)

"Then late that night, when the fire was out
we came up from the cellar below.
The pub was burnt, our booze was gone,
our heads was hanging low.
The up spoke Brown, with face quite queer,
and said, "don't look so sour"
"we've got to get down to Murphy's Pub -
it closes in an hour!

I think it's an apt ending!