Just after thinking of Jesus' "riddling sentence," and just before reciting his riddle of the fox, Stephen recalls the opening lines of a familiar riddle: "Riddle me, riddle me, randy ro. My father gave me seeds to sow." Thornton quotes the lines that follow: "The seed was black and the ground was white. / Riddle me that and I'll give you a pipe (or a pint)." The answer, he notes (quoting from English Riddles from Oral Tradition), is "writing a letter."
"Stephen simply suppresses the final lines of this riddle, as he suppresses parts of other things he alludes to," Thornton observes. ""Probably he does so here because the riddle and its solution remind him of his failure to justify himself as an author."
Eric S. Egan has set to music several bits of poetry found in Ulysses, including this one.