I had hit the right chord, and the boy was all ears. In a low voice I told him of the two ladies in the cars, sent him to look at them, without their seeing him eye them, and come right out. I told him that I wished him to follow them, keeping at a distance behind, not let them suspect him, and if they separated, to follow the larger one (the lady with the peculiar silk dress), and if she stopped in stores or houses, to wait till she came out, and not give up watching her till he was sure she had stopped for the last time that day, and was at her home, and to take the number and street, so as to be able to go and point out the place to me. "Could he do this nicely, and not be suspected?" The little fellow's pride was all aroused. He knew he could do it "all right," and he would follow her into the night, he said, if necessary. Then I told him where I lived, and put the number on the back of my card, and told him if he got hungry or benighted to come and stay over night at my house. The little fellow had probably never been treated with such distinction before, for the tears came into his eyes. I had hardly got my arrangements with him made when the bell announced that somebody wished to get out at 22d Street, and forth came the two ladies. I clapped his cap over the boy's eyes, that the ladies might not get a glimpse at those wonderful "orbs" of his, and took him on to the next street, when I let him off, with the injunction to "stick to it, and give me a good report." I had told him to use his money for rides in the omnibuses or cars, if necessary, and I would pay him; and this seemed to make him still prouder.