Joyce himself must have known the house as the residence of Mr. Denis J. Maginni, professor of dancing, who appears several times in Ulysses.
Denis J. Maginni never appears in Ulysses.
mnli hypothesis: Denis J. Maginni never appears in Ulysses. premise: Joyce himself must have known the house as the residence of Mr. Denis J. Maginni, professor of dancing, who appears several times in Ulysses.