Miss Henderson was growing more and more puzzled. In her day the students had not been in the habit of way-laying strangers with invitations to go walking and sit on fences. "Ah, _do_ stay with us," Bonnie begged, laying a hand on her arm. "We're lonely and want some one to talk to--we'll tell you a secret if you do." "I am sorry," Miss Henderson murmured confusedly, "but--" "We'll tell you the secret anyway," said Bonnie, generously, "and I'm sure you'll be interested. The sophomores are going to have their tree ceremonies to-night!" "And you know," Priscilla broke in, "that the freshmen really ought to attend them too--it doesn't matter if they aren't invited. But where do you suppose the freshmen are to-night? They're attending a foolish little lecture on the Roman Forum." "And though we don't wish to seem insistent," Bonnie added, "we should really like to have your company until the lecture is over." "Until the lecture is over! But I am the lecturer," gasped Miss Henderson. Bonnie grinned delightedly. "I am happy to meet you," she said, with a bow. "And perhaps you do not recognize us. I am Mr. Sherlock Holmes, and this is my friend Dr. Watson." Dr. Watson bowed, and remarked that it was an unexpected pleasure. He had often heard of the famous lecturer, but had never hoped to meet her. Miss Henderson, who was not very conversant with recent literature, looked more dazed than ever. It flashed across her mind that there was an insane asylum in the neighborhood, and the thought was not reassuring. "We'll not handcuff you," said Bonnie, magnanimously, "if you'll come with us quietly." The lecturer, in spite of fervid protestations that she was a lecturer, presently found herself sitting on the fence, with a girl on either side grasping an elbow. A light was beginning to break upon her, together with a poignant realization of the fact that she was seeing more of the real college life than she cared for. "What time is it?" she asked anxiously. "Ten minutes past eight by my watch, but I think it's a little slow," said Bonnie. "I am afraid you're going to be late for your lecture," said Priscilla. "It seems a pity to waste it. Suppose you tell it to us instead." "Yes, do," urged Bonnie. "I just dote on the Roman Forum." The lecturer preserved a dignified silence, which was broken only by the croaking of the frogs and the occasional remarks of the two detectives. She had relinquished all hope of ever seeing the Archaeological Society, and had philosophically resigned herself to the prospect of sitting on the fence all night, when suddenly there burst out from across the campus a song of victory, mingled with cheers and inarticulate yells.