"I've got to send you," said Greg, "because I might be recognized. You're to take up your stand just above the entrance to the apartment house where you can roll down to the door at the right moment. You may have to wait a considerable time. Throw back the hood of your engine and fool around inside with a wrench. This will give you an excuse for standing there so long, and will enable you to turn down anybody else who might want to engage you. But keep your eye on the entrance to the apartment house, and the minute that the girl you have heard described so many times comes out, close your engine and call attention to your cab as if asking for a fare, see? "I don't know if they let her out alone or not; probably not. If she is by herself bring her down Riverside past the Soldiers and Sailors monument, where I will be waiting under cover. If you have her inside alone, point up with your finger as you pass the monument and stop beyond, and I will join you. But if one or both of the other women are with her, point down as you pass and keep on to wherever they wish you to take them. Don't forget now; point up for good news and stop; point down for bad news and keep on." "I get you." "One thing more. Supposing the ladies come out together and you are engaged to take them on a shopping expedition or anything like that, when they are through with you, charge them bargain rates, see? Give them a discount of twenty per cent off the legal fare. Tell them it's because you're trying to work up a regular trade and you hope they'll engage you again. If we can only get them to hire you every day in advance, it will establish first-rate communications." "I'm on," said Hickey. Greg rode up-town with him as far as the Soldiers and Sailors monument. On the way he scribbled a note worded in such a way that none but the one it was intended for would be able to make sense of it. In it he told the girl he had secured the body as she had desired, and asked for further instructions. He was very cold and formal, hoping that she might be led to ask the reason when she replied. He tucked this note behind the seat in the spot where he had found the diamond pin.