From CD #1:
Words and music by Harry B. Norris;
This cheerful ditty is perhaps the most frequently mentioned song in Ulysses. Milly's morning letter to Bloom erroneously refers to the song as having been written by Blazes Boylan, and Bloom associates the song with Boylan throughout much of the rest of the book. It becomes the motif of the universal temptress figures leading all men to their eventual destruction. Most of the subsequent references to the song in Ulysses are made by Bloom, who of course is never far from female temptation.
[from CD liner notes, contributed by Prof. Zack Bowen]