However, both Mildred Thornton and Nona Davis having already sacrificed so much to their four years of Red Cross service in Europe, had decided to make this ultimate sacrifice in the postponing of their happiness. Yet here during the temporary pause of their Red Cross unit in Luxemburg, Sonya was able to see that the two girls were finding their self-surrender harder to accept bravely than they had anticipated. Whenever it was possible without neglecting their duties they were apt to wander off for mutual sympathy and confidences. Even Sonya found herself often ignored or forgotten. Sometimes she feared that they might harbor a slight resentment, because it was her husband, Dr. David Clark, who had asked the personal sacrifice. With two other of her Red Cross nurses Sonya had neither much sympathy nor understanding. Ruth Carroll had never interested her particularly; she was a large, quiet girl, ordinarily a dutiful and fairly reliable nurse, but without special gifts, although as a matter of fact, Dr. Clark had not shared in his wife's disparaging opinion. However, Sonya knew herself to be prejudiced and not so much by Ruth herself as by reason of her close friendship with Theodosia Thompson and the younger girl's undoubted influence upon her. Thea had been right in her supposition that Mrs. Clark neither liked nor trusted her particularly, although Sonya herself had scarcely been aware of her own point of view until after the beginning of the journey of her Red Cross unit toward Germany. Since then Sonya was not at all sure that Thea might not prove an uncomfortable if not an actually mischievous influence. One of Dr. Clark's old students at a prominent New York Medical University and afterwards his assistant, Dr. Hugh Raymond, was a young physician in whom the older man had extraordinary confidence and for whom he hoped great things. In the Red Cross hospital near Chateau-Thierry he had done splendid and untiring work. But both Sonya and her husband had often smiled over the young doctor's apparent dislike of women and girls. Not even with Sonya herself had he been willing to be more than coldly friendly. Yet since the movement of their unit toward the Rhine, Sonya had noticed an odd change in him. At first it had appeared as if Thea's attempts to make him show an interest in her had simply annoyed him. Later she seemed to provoke him. Recently Sonya believed Thea was having a marked effect upon him, sometimes aggravating and at other times pleasing him. And although Sonya believed she understood human nature, she also realized that nothing would irritate her husband more profoundly than to discover any kind of personal feeling existing between his nurses and physicians. During all the Red Cross work in Europe from this complication they had been singularly free.