Stirred by the glimpse of the refined face, and even more by the carriage of the little head under the dainty hat, Keith quickened his pace to obtain another glance at her. He had almost overtaken her when she stopped in front of a well-lighted window of a music-store. The light that fell on her face revealed to him a face of unusual beauty. Something about her graceful pose as, with her dark brows slightly knitted, she bent forward and scanned intently the pieces of music within, awakened old associations in Keith's mind, and sent him back to his boyhood at Elphinstone. And under an impulse, which he could better justify to himself than to her, he did a very audacious and improper thing. Taking off his hat, he spoke to her. She had been so absorbed that for a moment she did not comprehend that it was she he was addressing. Then, as it came to her that it was she to whom this stranger was speaking, she drew herself up and gave him a look of such withering scorn that Keith felt himself shrink. Next second, with her head high in the air, she had turned without a word and sped up the street, leaving Keith feeling very cheap and subdued. But that glance from dark eyes flashing with indignation had filled Keith with a sensation to which he had long been a stranger. Something about the simple dress, the high-bred face with its fine scorn; something about the patrician air of mingled horror and contempt, had suddenly cleaved through the worldly crust that had been encasing him for some time, and reaching his better self, awakened an emotion that he had thought gone forever. It was like a lightning-flash in the darkness. He knew that she had entered his life. His resolution was taken on the instant. He would meet her, and if she were what she looked to be--again Elphinstone and his youth swept into his mind. He already was conscious of a sense of protection; he felt curiously that he had the right to protect her. If he had addressed her, might not others do so? The thought made his blood boil. He almost wished that some one would attempt it, that he might assert his right to show her what he was, and thus retrieve himself in her eyes. Besides, he must know where she lived. So he followed her at a respectful distance till she ran up the steps of one of the better class of houses and disappeared within. He was too far off to be able to tell which house it was that she entered, but it was in the same block with Norman Wentworth's house. Keith walked the avenue that night for a long time, pondering how he should find and explain his conduct to the young music-teacher, for a music-teacher he had decided she must be. The next evening, too, he strolled for an hour on the avenue, scanning from a distance every fair passer-by, but he saw nothing of her. Mrs. Creamer's balls were, as Norman had once said, _the_ balls of the season. "Only the rich and the noble were expected."