"I do not think so," I answered. "Your husband was in a weak state, notwithstanding his boasted strength. From what you tell me, he evidently exerted himself more than was wise while at Cambridge. By doing so, he strained a weakened frame. The brain forms the highest part of that frame, Mrs. Mainwaring, the highest and also the most easily put out of order. Your husband exerted his body too much, and excited his brain by old memories and the regrets which must come to a man when he visits the scene of vanished friendships. You say that Mr. Mainwaring was visibly affected when he heard of his great friend's death?" "He was, he was. He turned white when the Dean told him. The death was tragic, too. Walter Leigh was killed on an Alpine expedition. The marvellous thing was how the news never reached my husband before. This can only be accounted for by the fact that he spent the year of Mr. Leigh's death in America." "All this confirms my theory," I continued, "that your husband's brain, long weakened by serious illness, suddenly gave way. Brain derangement, as we know, takes all kinds of unexpected forms. I believe that the form it has taken in Mainwaring's case is this. He has forgotten the recent years of his life and has gone back again to his old college days. His letter to the Don of Trinity College who has so long been dead confirms this theory. His strange conduct with regard to you, Mrs. Mainwaring, further strengthens it. I feel almost certain that I am right in these impressions. They are sufficiently strong to make me anxious to visit Dover immediately. Now, shall I go alone, or will you come with me?" "Of course I'll come with you," she answered. She rose and began to draw on her gloves. It was late June now, and the day had been a hot one. The twilight had faded into night when I assisted Mrs. Mainwaring into a hansom and directed the driver to take us to Victoria Station. [Illustration: "I ASSISTED MRS. MAINWARING INTO A HANSOM."] We caught our train by a minute or two, and in process of time found ourselves at Dover. During the journey Mrs. Mainwaring scarcely uttered a word. She had drawn her veil over her face and sat huddled up in a corner of the carriage, as if she were turned into stone. I saw that she was partly stunned by the shock, and I felt anxious about her, as well as her husband. When we arrived at Dover, she drew up her veil and said, impulsively:-- "What do you mean to do?" "Before I do anything I must ask you another question." I replied. "Have you any idea what your husband's habits were ten years ago? Was he extravagant or careful? For instance, on arriving at Dover, would he be likely to go to a good hotel?" "He would go to the best," she answered. "He is not careful of money now, and I am sure he never could have been in the past."