I Googled for "Malchasene" and discovered something called The Minnesota Heritage Songbook, compiled and edited by Robert B. Waltz. (Waltz is also the editor of The Traditional Ballad Index.)

This book (which you can download free of charge) contains SKIBBEREEN. Waltz used Dean's text, but made 4 changes, all documented with footnotes:

1. "Demon yell of spleen" changed to "demon yellow spleen" based on Patrick Galvin's "Irish Songs of Resistance."

2. "Malchasene" changed to "mortal dream" based on "Soodlum's Irish Ballad Book."

3. "Ninety-eight" changed to "forty-eight" on the ground that it makes more sense.

4. "Kosamane" change to "cotamore" based on Soodlum's.

Also, he changed "fin" to "fen."

Waltz also gives a bit of information about Michael Cassius Dean: "Dean was a sailor on the Great Lakes, and in 1922, he gathered together the songs he had learned on the Lakes and had them published." The resulting book, "Flying Cloud" was a major source for "The Minnesota Heritage Songbook."