"Don't you worry about that," said Greg. "You'll soon be with her again. Listen carefully, and I'll tell you what to do." But the instructions were not delivered just then, for Frank came running down-stairs to say that Señor de Socotra had just ordered a taxi to be at the door in three minutes. CHAPTER XVI THE "PSYCHOPATHIC SANITARIUM" Greg said to Nina: "Wait here till I come back or send for you." "Boss, let me in on this," begged Frank. "Very well, come with me," said Greg. They went out _via_ the basement door of the building which led to the side street. The Stickney Arms as has already been described fronted on a narrow roadway which was terraced above the Drive proper. There was a sloping sward between roadway and Drive, which was set out with clumps of ornamental shrubbery. One such clump across the road from the main entrance offered Greg an ideal observation post. First he took Frank to the two cabs and the waiting men. "This boy is one of us," he said. "Let him wait with you until I give you a signal. Get in the cabs out of sight." By a roundabout course Greg made his way to his place of concealment. Presently the cab ordered by de Socotra drove up. A moment or two later a little procession appeared in the corridor: de Socotra tenderly supporting Amy on one side, and a trained nurse on the other,--"Where did she come from?" thought Greg. Two hall-boys, laden with rugs, valises, etc., brought up the rear. As they drew closer, in the nurse Greg suddenly recognized the handsome, hard features of Bianca. "Of course!" he thought. "De Socotra would never trust Amy in an institution without his own personal spy to keep watch of her." Greg smiled in satisfaction. This meant that they were leaving the innocent Señora de Socotra alone in the apartment, making his task a hundred times easier. All the luck was not against him to-night. He let them drive away without making any signal to his men. Since he knew where they were going, there was no especial hurry. The cab turned into the drive and headed down-town. Greg joined his expectant men and issued his instructions. "Frank, you go back to Nina and tell her they're all gone out except the old lady. She must be pretty near distracted by what's happened. She'll be glad enough to have Nina back for company. Tell Nina to go right up-stairs on the pretext of getting her things. Tell her I'm sending in one of my men who will claim to be the piano man, and that she is to let him in and help him. By the way, what is the name of the people who own that apartment?" "Merriweather." "Good. Blossom will say that Mr. Merriweather made an arrangement to have the piano inspected monthly. And he can explain the lateness of his call by saying--let me see--I have it! Blossom will say that his baby is going to be christened to-morrow, and he's doubling up his work to-day, so that he can get a day off. Nothing like a little touch of homeliness to make a story carry!"