The Black Moth by Georgette Heyer

Richard Carstares very soon availed himself of Mrs. Fanshawe's permission to call upon her, and duly put in an appearance at No. 16, Mount Street. He found the house very tastefully appointed, the sister elderly and good-natured, and the widow herself an excellent hostess. The first time he called he was not the only visitor; two ladies whom he did not know and a young cousin were already there, and later, a bowing acquaintance, Mr. Standish, also arrived. Seeing that he would have no opportunity to talk with the widow on the subject of his brother, he very soon took his leave, promising to wait upon her again at no very distant date. When, three days later, he again sent in his name and was admitted, he found the lady alone, and was gratified to hear her order the servant to deny her to all other visitors.

He bowed over her hand and hoped she was well.