Philip's friend has sent him an address for a rooming house
in Paris, but he is writing from Italy, and it looks as though he uses an Italian word, perhaps meaning "landlady".
I could not find it in an online Italian-English dictionary.
"But Philip ceased to think of her a moment after he had settled down in his carriage. He thought only of the future. He had written to Mrs. Otter, the massiere to whom Hayward had given him an introduction, and had in his pocket an invitation to tea on the following day.