"Sometimes Philip thought of Mildred. He avoided deliberately the streets in which there was a chance of seeing her; but occasionally some feeling, perhaps curiosity, perhaps something deeper which he would not acknowledge, made him wander about Piccadilly and Regent Street during the hours when she might be expected to be there. He did not know then whether he wished to see her or dreaded it. Once he saw a back which reminded him of hers, and for a moment he thought it was she; it gave him a curious sensation: it was a strange sharp pain in his heart, there was fear in it and a sickening dismay; and when he hurried on and found that he was mistaken he did not know whether it was relief that he experienced or disappointment."
W. Somerset Maugham - Of Human Bondage