"Hum," said Tod, glancing at Arnold. "I didn't think she would have admitted so much." "Tod," Gerald caught his friend's arm, "don't worry me with your hints and looks. Has Mrs. Crosbie anything to do with this crime?" "I can't say," rejoined the solicitor stolidly, "and I shan't speak until you tell me how you got along with Rebb." Haskins threw himself back in his chair and made the best of a Scotsman's obstinacy. "I have something very important indeed to tell you," he said seriously. "You know the likeness between the girls?" Macandrew nodded. "I told Mr. Arnold here all about it, and about your idea of the two beings twins." "My idea has proved to be correct. They _are_ twins." Tod jumped up, scattering his papers, and with his red hair almost standing on end. "Do you mean to say that Rebb----" "Yes. Sit down. Toddy, and listen," said Gerald vigorously, and when his legal adviser became quiet he related the whole of the conversation with Rebb. "Well I'm blessed," muttered Tod, rubbing his head, when the narrative was ended, "what a wonderful thing! There is something in your intuitions after all, Jerry." "I don't think it needed much intuition to guess at a possible relationship, seeing how marvelously alike Mavis is to Charity. The wonderful part consists in my getting Rebb to give himself away." "Ah," said Arnold significantly, "the military gentleman is beginning to see that the wheel of fortune is turning the wrong way with him." "And quite right too," said Tod meditatively. "What a scoundrel the man is, to be sure! Well, Jerry, important as what you have told us is, I am more interested in the movements of Mrs. Crosbie and her mother. When you tell me about them I can explain what Mr. Arnold and myself have discovered at Belldown." "There is little to tell about them. Rebb came down after me, and they came down after Rebb. He asked his future bride here to have a second look at her future home." "Oh, so she had been here before?" "Yes--so she says--some time ago. This is her second visit." "Her third, more like," muttered Arnold, in his beard. "We can't be sure of that," said Tod rapidly. "For Heaven's sake, tell me what you mean," cried Haskins, jumping up in his turn, "my nerves are wearing thin with all this suspense." "Well then," began Macandrew, shuffling with his papers, "it's this way. Mr. Arnold here was going about the country in his caravan, selling books, and reached Belldown on the same day that Mavis fled." "Mavis fled at night." "Well, well," cried Macandrew testily, "you know what I mean. Arnold was at Belldown on the day of the night when Mavis fled and the murder was committed. Is that plain enough?" "Yes. Go on, Toddy. Don't be a silly ass." "I am your solicitor just now and not your pal," said Tod, with great dignity; "well then, while wandering about Belldown, Arnold saw two ladies in a motor car. One was driving and one was being driven." "And they were----"