"Who is this mysterious 'somebody else'?"
I honestly can't remember, but I got the information from the late Tom Munnelly, who was arguably one of the greatest collectors of traditional song ever and whose knowledge of the subject was second to none.
Tom told me the name of the composer (another Traveller) when we both attended a concert in Limerick at which 'The Pecker' was performing. Unfortunately he isn't around any more to ask, which is why I raised the point.
It is easy enough to get the names wrong nowadays - I wish I had a euro for every time I have heard Jimmy Crowley's 'Pool Song' - which, of course, was written by Con 'Fada Ó Drisceol.
Jim Carroll