In Ghostly Japan - Lafcadio Hearn

One night, at a very late hour, Tomozo heard the voice of a woman in his master's apartment; and this made him uneasy. He feared that Shinzaburo, being very gentle and affectionate, might be made the dupe of some cunning wanton, --in which event the domestics would be the first to suffer. He therefore resolved to watch; and on the following night he stole on tiptoe to Shinzaburo's dwelling, and looked through a chink in one of the sliding shutters. By the glow of a night-lantern within the sleeping-room, he was able to perceive that his master and a strange woman were talking together under the mosquito-net