from plain stone structures built centuries ago and looking dull and drab, on to modern bungalows, gay with bright-tinted stucco and tiled roofs. Now and then she could catch glimpses of richly furnished rooms behind the iron bars of a window, and a flower-adorned courtyard or patio through an open door. “I love the courtyards,” she remarked. “The great arches, the fountain in the center, and the tropical plants make them beautiful and restful-looking.” “Yes, they are delightful,” agreed Florence. “Señor Rodriguez, the lawyer Daddy told you about, has one of the most beautiful patios in his house that I’ve ever seen. You’ll enjoy seeing it when we go over to see his library. I’ve wished many times that our house had a patio.” “I’ve been wondering why it doesn’t, since all the other old houses have them. There’s something strange about the way your house is built. I believe when we solve the mystery of that queer little window, we’ll find out some interesting things about the rest of the house.” “Is that the cathedral and the Plaza already?” asked Peggy in surprise just then. “How did we get here so soon? I’ve had such a wonderful time that it seems that we’ve only started.” “May I ask a favor, Florence?” asked Jo Ann as they drove up before the house. “Let’s drive down that street back of your house before we go in.” “Why—I—I don’t think——” began Florence stammeringly, then stopped, hardly knowing what to say. “You said we couldn’t walk down there, didn’t you?—and I do so want to see it,” Jo Ann urged. After talking to Felipe a few moments Florence answered with a half-apologetic smile, “Felipe says mañana he’ll take us.” “Mañana?” repeated Jo Ann. “Oh, you mean tomorrow?” “Yes, it’s too late now.” Jo Ann turned to Felipe, who was opening the door for them. “Por favor, Felipe,” she begged. “Please, Felipe,” added Peggy quickly. She was not particularly interested in going down that back street, but it was so pleasant to be out at this time of the evening that she disliked the idea of going back into the gloomy house. “He says he’ll take us if we insist,” translated Florence a moment later, after talking to Felipe again. “But really, girls, I feel that we shouldn’t go now.