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 was also a painter.
mnli hypothesis: Denis J. Maginni was also a painter. 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.