At the first sound, Bonnie and Priscilla tumbled down from the fence, bringing the lecturer with them, and, each grasping her by a hand, they started to run. "Come on and see the fun," they laughed. "You're perfectly welcome; it's no secret any more." And, in spite of breathless protestations that she much preferred to walk, Miss Henderson found herself dashing across the campus in the direction of the sounds. Heads suddenly appeared in the dormitory windows, doors banged, and girls came running from every quarter with excited exclamations: "The sophomores are having their tree ceremonies!" "Where are the freshmen?" "Why didn't they get there?" A crowd quickly gathered in the shadow of the trees and watched the scene with laughing interest. A wide circle of colored lanterns swayed in the breeze, and, within, a line of white-robed figures wound and unwound about a tiny tree to the music of a solemn chant. "Isn't it pretty? Aren't you glad we brought you?" Bonnie demanded as they pushed through the crowd. The lecturer did not answer, for she caught sight of the Latin professor hurrying toward them. "Miss Henderson! I was afraid you were lost. It is nearly half-past eight. The audience has been waiting, and we have been filling in the time with reports." For a moment the lecturer was silent, being occupied with an amused scrutiny of the faces of her captors; and then she rose to the occasion like a lady and a scholar, and delivered a masterly apology, with never a reference to her sojourn on the fence. Bonnie and Priscilla stared at each other without a word, and as Miss Henderson was led away to the remnants of her audience Patty suddenly appeared. "Good evening, Mr. Sherlock Holmes and Dr. Watson. Did you solve your mystery?" she asked sweetly. Priscilla turned her to the light and scrutinized her face. Patty smiled back with wide-open, innocent eyes. Priscilla knew the expression, and she shook her. "You little wretch!" she exclaimed. Patty squirmed out from under her grasp. "If you remember," she murmured, "I once said that the Lick Observatory was in Dublin, Ireland. It was a very funny mistake, of course, but I know of others that are funnier." "What do you mean?" Bonnie demanded. "I mean," said Patty, "that I wish you never to mention the Lick Observatory again." XV Patty and the Bishop The dressing-bell rang for Sunday morning service, and Patty laid down her book with a sigh and went and stood by the open window. The outside world was a shimmering green and yellow, the trees showed a feathery fringe against the sky, and the breeze was redolent of violets and fresh earth. "Patty," called Priscilla, from her bedroom, "you'll have to hurry if you want me to fasten your dress. I have to go to choir rehearsal." Patty turned back with another sigh, and began slowly unhooking her collar. Then she sat down on the edge of the couch and stared absently out of the window.