Trained and disciplined as he had been in the sternest of all schools, and strengthened as he was by the knowledge of the compact that existed between them, there were moments when his self-control was very sorely tried, moments when her hand would be clasped in his, or rested on his shoulder as he helped her across a stream or down some steep hillside, or when in the midst of some animated discussion she would stop short and face him, and suddenly confound his logic with a flash from her eyes and a smile on her lips that literally forced him to put forth a muscular effort to prevent himself from catching her in his arms and risking everything for just one kiss, one taste of the forbidden fruit within his reach, and yet parted from him by a sea of blood and flame that still lay between the world and that empire of peace which he had promised to win for her sweet sake. Once, and once only, she had tried him almost too far. They had been discussing the possibility of ruling the world without the ultimate appeal to force, when the nations, weary at length of war, should have consented to disarm, and she, carried away by her own eloquent pleading for the ultimate triumph of peace and goodwill on earth, had laid her hand upon his arm, and was looking up at him with her lovely face aglow with the sweetest expression even he had ever seen upon it. Their eyes met, and there was a sudden silence between them. The eloquent words died upon her lips, and a deep flush rose to her cheeks and then faded instantly away, leaving her pale and with a look almost of terror in her eyes. He took a quick step backwards, and, turning away as though he feared to look any longer upon her beauty, said in a low tone that trembled with the strength of his repressed passion-- "Natasha, for God's sake remember that I am only made of flesh and blood!" In a moment she was by his side again, this time with her eyes downcast and her proud little head bent as though in acknowledgment of his reproof. Then she looked up again, and held out her hand and said-- "Forgive me; I have done wrong! Let us be friends again!" There was a gentle emphasis on the word "friends" that was irresistible. He took her hand in silence, and after a pressure that was almost imperceptibly returned, let it go again, and they walked on together; but there was very little more said between them that evening. This had happened one afternoon towards the middle of September, and two days later their delightful companionship came suddenly to an end, and the bond that existed between them was severed in a moment without warning, as a nerve thrilling with pleasure might be cut by an unexpected blow with a knife.