That would be  HERE.  I too have always believed the song to come from the Halls, and I still do; the Clanceys recorded the song years ago and may have altered the text and tune a bit (enough to claim a copyright, perhaps) but I really don't think that it's Irish; the tune is typically music hall.  Anyone who has the booklet that came with The Tale of Ale may be able to help with more information; all I could find on the web were references to recordings of "Irish" drinking songs, most of which were actually English or Scots...

Malcolm