Dave has it right- a different person. Jim's bands included skiffle groups, the Marsden Rattlers, the Harvesters and Eddie Groyne and the Strains, but not any 'Irish' ones as far as I know.
He was, however, a great admirer of fiddlers he'd met, like Ted Furey, Bobby Casey, Martin Byrnes (not 'Mairtin' in those days) Michael Gorman and Tom Anderson.
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sj