OK for Manx National Songs try - https://ia601407.us.archive.org/11/items/manxnationalson00gillgoog/manxnationalson00gillgoog.pdf

and scroll through to p115.
The words are credited to Charles Dalman because only the title and tune were collected from Tom Kermode of Ballakaighen, IOM.
The words making up the title occur in versions of The Royal Blackbird in :-
THE BLACKBIRD -A Jacobite Relic - from: Irish Minstrelsy, c1890. The Walter Scott Publishing Co., London.
THE BLACKBIRD - Hogg – JROS v2 pp68-69
THE BLACKBIRD - Tocher No 34. p 244 Collected by Hamish Henderson.1953.
THE BLACKBIRD - Songs of Irish Rebellion - Zimmerman pp119