Hastily they prepared coffee and dainty sandwiches, then went to the office for Dr. Blackwell, who promptly accepted the invitation to the merienda.

“We’ll join you in the dining room in a minute,” Florence told him.

As soon as Dr. Blackwell had left the office and Florence had sent Felipe to the drugstore for some ice cream, Peggy grasped this opportunity to call Jo Ann. She flew to the balcony and whistled softly. The moment Jo Ann’s head appeared over the wall she called, “The coast’s clear. You’ll have to hurry, though.”

Jo Ann needed no urging to get off the roof. She literally dropped to the balcony, drew the rope up and fastened the cord in its accustomed place, then ran to her room.

In an amazingly short time she emerged looking cool and fresh in a soft green dress. Meeting Felipe in the hall with the ice cream, she offered to carry it to the dining room.

When they were almost through their lunch Felipe announced that a patient was waiting to see el doctor.

The moment Dr. Blackwell was out of hearing Peggy burst out, “Jo, tell us quickly, before anything else happens, what you found in that room.”

“I found plenty. There’s a bigger mystery than we ever dreamed of.”

“Well, tell us—what is it?” insisted Peggy.

“Yes, do hurry, Jo,” added Florence. “I can’t wait another instant.”