A friend recently "turned me on to" this song, and a rollicking little ditty it is.
At first I thought that it was a "traditional" piece, but since have seen evidence of more recent composition. Is "Bedlam", in fact, a modern arrangement of a traditional song, or is it an entirely new work that just sounds "trad"?
That would put it somewhat in the league, I suppose, of "Ashokan Farewell" by Jay Ungar, which nearly everyone who watched the Ken Burns Civil War series on PBS now thinks was around in the 1860's.
Knowing the true vintage of "Bedlam" would certainly impact when, how, and where I might perform it (most likely on the tinwhistle) - not to mention the "public domain" issue.