"Mrs. Levering has promised Frank the first dance after she arrives. He will then make an engagement with her for another dance to fall just before midnight as near as he can figure it, and after dancing with her the second time will take her out to this bench.
Foxy and English will already be in hiding in the shrubbery behind the bench. Foxy has an invitation to the affair, and he will go in evening dress and mix with the guests until he sees Frank dancing with Mrs. Levering the second time. He will then go out of the house and conceal himself in the shrubbery.
English will already be waiting there. English must be there by eleven to make sure. English wears his ordinary clothes, and slips in by the service entrance to the grounds, marked on the plan here. Once inside the gates he must make his way under cover to the shrubbery behind the bench. English will carry an old overcoat for Foxy which will be provided. There will be a mask in one side pocket, a cap in the other. As soon as you two meet, Foxy will put on the things.
"Now as to the actual trick. It is perfectly simple. Frank is keeping Mrs. Levering in conversation on the bench. Foxy sneaks up behind with the nippers, cuts the necklace, and tosses it back to English, who remains in the bushes.
"The woman will scream, of course. Foxy will stand up and show himself, and run in this direction, that is, towards the house. Frank will take after him for a way, and then go back to the woman. Foxy will double around this shrubbery that conceals the stable entrance. As soon as he is out of sight of the woman he will throw off the cap, mask and coat, and go back to Mrs. Levering as one of the first attracted by her cries. If she does not cry out, he can mix with the crowd in the house until he has a chance to make a getaway.
Meanwhile, English lies quiet in the shrubbery until the excitement has passed out of the vicinity. Then he slips out by the service gate, the same way he went in. Jim will be waiting with the car about five hundred feet beyond the service entrance, towards town. We have been over this ground. There is a big clump of rhododendrons inside the sidewalk at this point.
English, without stopping, will toss the necklace inside the car. But if he is pursued he had better drop it among the rhododendrons. Mind you, English, if there's anybody after you, don't make any throwing motion with your arm. If there is a chase Jim can join in it, and help English make his getaway. Later he can return and get the diamonds.
English takes the trolley to Providence, and the owl train back to New York. Jim secretes the diamonds in the secret pocket in the car, and waits for Foxy. If Foxy is pursued, however, he must not lead them to the car. Jim waits until one-thirty. If Foxy has not arrived, he takes the car to the Atlantic garage. You, Jim, ask them to let you sleep in it, see? as you're expecting a call from your master. Foxy can get the car from the garage any time after that."
Lorina went over all this twice. At the end she consulted her watch. "If any of you want to have anything explained, speak up. I've got to catch the four o'clock back to town."
Frank was the only one who had any objection to raise to the arrangements. "Look here," said he, "this will queer me for good with that lot, even if they can't fasten anything on me."