'I can,' she replied, 'but it will be a little difficult to do without exciting suspicion and precipitating discovery, if indeed the discovery is to be made. I cannot send for her to come to me openly--such an invitation would astonish Mrs. Griswold, and she might meet it with an objection--neither can I go in my proper capacity to Mrs. Griswold's house to visit one of Mrs. Griswold's servants.' 'Why can't you go as a servant yourself?' said Bryan Duval. 'Your make-up in that line is unexceptionable; try it off the boards at once!' 'I will,' said Miss Montressor; 'that is a capital idea. I will go disguised, and discover whether the lady at the play really was Mrs. Griswold. If I cannot see her, which I may manage to do by some contrivance, I shall at least be sure to see a portrait of her. A man like her husband was not likely to be satisfied with a mere miniature of his wife while a full-length portrait was to be had for money. We are, of course, morally certain that the fact is what we take it to be, but the first thing to be done is to achieve actual certainty. Taking it for granted that I see Mrs. Griswold and identify her with the miniature, what will you do next?' 'I cannot decide upon that until I have received your report,' said Bryan Duval, 'on these two heads--first, the identity of Mrs. Griswold with the portrait Mr. Foster showed you; secondly, the name and address of some intimate friend of the family, with whom I may at once communicate.' 'I am quite sure there is such a person,' interrupted Miss Montressor. 'I could not distinctly recall everything that Mr. Foster told me, in the hurry and confusion of last night; but since then I have remembered a good deal. He mentioned to me, but not by name, one friend in particular, in whose charge he had confided not only his business interests in New York during his absence, but also his household treasures. Poor fellow, he quite amused me--though I am conscious now that I did not respond very warmly or graciously--by his simple talk about his wife and child. He would try to describe the baby to me, and he did describe the mother as well as showing me her picture. He was a good soul. But I quite remember now that he told me he had this trusty friend.'