“Put on the white cap and apron,” instructed Matt, “then pick up the tray and rap on the door. When the door’s opened, throw the tray in the face of the fellow in the hall. There’ll be a commotion, and perhaps the guard outside will leave the windows. If he does, I’ll get out and make for the red car. Meet me somewhere along the drive, this side the gate. It’s a desperate chance, Joe, but it’s all we have.”