When he looked at his hand, he could see it and its mirror image. He was instructed to put his phantom limb in the box and try to position it, as best he could, so that it corresponded to the mirror image of his good hand. Then, he was instructed to make synchronous, bilaterally symmetrical movements of his arms his actual right arm and his phantom left arm while viewing his good arm and its mirror image. Ramachandran sent Philip home with the box and instructed him to use it frequently. Three weeks later, Philip phoned.