It was on a fine morning that Mr. Langdon made his appearance, as master for the English branches, in the great school-room of the Apollinean Institute. The principal, Mr. Silas Peckham, carried him to the desk of the young lady assistant, Miss Darley by name, and introduced him to her. The young lady assistant had to point out to the new master the whole routine of the classes, and Mr. Langdon had a great many questions to ask relating to his new duties. The truth is, the general effect of the school-room, with its scores of young girls, was enough to confuse a young man like Mr. Langdon, and he may be pardoned for asking Miss Darley questions about his scholars as well as about their lessons. He asked who one or two girls were, and being answered, went on, "And who and what is that sitting a little apart there--that strange, wild-looking girl?" The lady teacher's face changed; one would have said she was frightened or troubled. The girl did not look up; she was winding a gold chain about her wrist, and then uncoiling it as if in a kind of reverie. Miss Darley drew close to the master, and placed her hand so as to hide her lips. "Don't look at her as if we were talking about her," she whispered softly, "that is Elsie Venner." A girl of about seventeen, tall, slender, was Elsie Venner. Black, piercing eyes, black hair, twisted in heavy braids, a face that one could not help looking at for its beauty, yet that one wanted to look away from, and could not, for those diamond eyes. Those eyes were fixed on the lady teacher one morning not long after Langdon's arrival. Miss Darley turned her own away, and let them wander over the other scholars. But the diamond eyes were on her still. She turned the leaves of several of her books, and finally, following some ill-defined impulse which she could not resist, left her place, and went to the young girl's desk. "What do you want of me, Elsie Venner?" It was a strange question to put, for the girl had not signified that she wished the teacher to come to her. "Nothing," she cried. "I thought I could make you come." The girl spoke in a low tone, a kind of half-whisper. Bernard Langdon experienced the power of those diamond eyes one particular day that summer. He had made up his mind to explore the dreaded Rattlesnake Ledge of the mountain, to examine the rocks, and perhaps to pick up an adventure in the zoological line; for he had on a pair of high, stout boots, and he carried a stick in his hand. High up on one of the precipitous walls of rock he saw some tufts of flowers, and knew them for flowers Elsie Venner had brought into the school-room. Presently on a natural platform where he sat down to rest, he found a hairpin.