I had not then been long enough in the Tombs to get used to it. I had not become hardened. The tragedy of this case amazed me. A little boy of fourteen condemned of deliberate murder! But the thing which impressed me most was the way the lawyers in the court room rushed up to congratulate the prosecutor for having won so doubtful a case. It would be revolting enough to me if any one should congratulate me on having sent an adult to the gallows. But this little boy of fourteen.... I went over the Bridge of Sighs and talked to Pietro in his cell. If ever a boy impressed me as telling a straightforward story he did. I was convinced that he had been at the riverside when the Casey baby was killed. After lunch I went up to the scene of the tragedy and my faith in Pietro’s innocence was considerably shaken although not overthrown by my talk with Mrs. Casey. She was angry, of course, but she did not seem malicious or vindictive. As I talked with her in her squalid basement room, full of steam from the tubs of soiled clothing, I could not doubt her sincerity. She really believed that Pietro had killed her child. Wiping the suds from her powerful arms, she led me out on the sidewalk and showed me the place where the baby had been sitting and pointed out where she had seen the devilish red head above the coping. The idea flashed into my mind that a boy would have to be surprisingly clever to throw a brick from that height and hit a baby. With Mrs. Casey following me, I went upon the roof. The chimneys were in a dilapidated condition and a number of loose brick lay about. I was a fairly good ball player at college, but when I tried to hit a water plug on the curb stone, six stories below, I over shot at least eight feet. I asked Mrs. Casey to try and her brick lit in the middle of the street. I called up some of the boys, who were watching my operations from the street, and offered them a quarter if they could hit the water plug. Their attempts were no better than mine. A little further along the low coping some bricks were piled where children had evidently been building houses with them. I asked Mrs. Casey to push one of them over, easily as if by accident. It fell out a little way from the wall and crashed down fair on the curbing. "Mrs. Casey," I said, "I don’t think Pietro threw that brick. He couldn’t have hit the baby if he had tried. Somebody pushed it over by accident." She stood for some seconds looking down over the wall, shaking her head uncertainly. "Faith, and I’d think ye were right, sir," she said at last, "If I hadn’t seen his red head, sir, jest as plain as I sees yours." And as we went down stairs, she kept repeating "I sure seen his red head." She was evidently convinced of it.