"Won't you come to Sandymount,
Madeline the mare?
Rhythm begins, you see. I hear. Acatalectic tetrameter of iambs marching. No, agallop: deline the mare." (U3.21)
It has been suggested that these lines reference Madeleine Lemaire (1845 - 1928), a French painter famous for portraits and flowers. Of possible (remote) relevance, Lemaire painted in the 1880's a picture of Ophelia that was shockingly untraditional: she showed Shakespeare's heroin leering with the glowering light of a vampire in her eyes, her dress slipped off her shoulders to reveal her breasts, thus suggesting that Ophelia's madness may have been driven, at least in part, by sexual frustration.