Now, in what I am about to say with respect to Gabriel Carew, I had, at that time, I admit, the slightest of grounds; and the powerful effect a certain suspicion had upon me was all the more singular because of the absence of reliable evidence. The study I had made for many years of the different forms in which insanity presents itself was very captivating to me, and in the course of my researches I unearthed some weird particulars, of which, were I a writer of fiction, I could make effective use. Gabriel Carew was an affectionate husband and father, a faithful mate to his wife, a wise counsellor to his daughter. He had not a vice which I could discover. He was neither a spendthrift nor a libertine. He drank in moderation, and he never gambled; indeed, he detested all games of chance. His views of men and manners were singularly correct, and denoted a well-balanced brain. It was only where his affections were concerned that he could be called in any way extravagant; but this would be accounted rather a virtue than a vice. His recreations were intellectual, and he sought pleasure and happiness only in his home and in association with books and his wife and child. What judgment would you, from a distance, pass upon such a man? What but that of entire approval? But I was in daily contact with him, and signs were visible to me which greatly disturbed me. To speak plainly, I doubted Gabriel Carew's perfect sanity! This was a matter of most serious moment. If Carew were not sane, his disease, so far as I could judge, was of a harmless form. The proof of this lay in his affection for those of his blood, and--which, in evidence is, in my opinion, quite as strong--in his tenderness to animals and birds. But I have to a certainty established not only that insanity is hereditary, but that what is harmless in the parent may become destructive in the child. Mildred was Carew's daughter, and to all appearance as free from any touch of insanity as the most healthful of human beings. But the germ must be in her, to be transmitted to her children--to Reginald's children if he married her. This consideration impelled me to secret action in the way of inquiry. It would have been, useless to appeal to Reginald, and to set before him the probable consequences of such an union. My counsel would have fallen upon idle ears. My duty, however, was clear. It was for me to protect him.