"I wish you had bothered about several things besides your ghosts," Paredes said. "You'd have found it significant that Blackburn laid the foundation of his fortune in Panama during the hideous scandals of the old French canal company. We knew he was a selfish tyrant. That discovery showed me how selfish, how merciless he was, for to succeed in Panama during those days required an utter contempt for all the standards of law and decency. The men who got along held life cheaper than a handful of coppers. That's what I meant when I walked around the hall talking of the ghosts of Panama. For I was beginning to see. Silas Blackburn's fear, his trip to Smithtown, were the first indications of the presence of the other Blackburn. The papers outlined him more clearly. Why had it been forgotten here, Doctor, that Silas Blackburn had a brother--his partner in those wretched and profitable contract scandals?" "You mean," the doctor answered, "Robert Blackburn. He was a year younger than Silas. This boy was named in memory of him. Why should any one have remembered? He died in South America more than a quarter of a century ago, before these children were born." "That's what Silas Blackburn told you when he came back," Paredes said. "He may have believed it at first or he may not have. I daresay he wanted to, for he came back with his brother's money as well as his own--the cash and the easily convertible securities that were all men would handle in that hell. But he never forgot that his brother's wife was alive, and when he ran from Panama he knew she was about to become a mother. "That brings me to the other feature that made me wander around here like a restless spirit myself that night. You had just told your story about the woman crying. If there was a strange woman around here it was almost certainly Maria. As Rawlins deduced, she must either be hysterical or signalling some one. Why should she come unless something had gone wrong the night she drugged Bobby to keep him in New York? She wasn't his enemy, because that very night she did him a good turn by trampling out his tracks in the court." Bobby took Maria's letter from his pocket and handed it to Paredes. "Then how would you account for this?" The Panamanian read the letter.