Hi Gutcher, i believe the composer of The Bar-room Mountaineers was Davey Clark(e?). Jack Foley has written the lovely Lassie O The Mornin' and the great Bottle O The Best - dont know if he's composed any more?
Try to find a recording of The Inverscotia Nomads (or Inverscotia Singers) as they had some brilliant songs in their repertoire