She must write to him. The sooner it was done, the better. Half a dozen contradictory moods passed over her during the composing of that letter; but to her they seemed but the unfolding of a single thought. On one page it might have been his mother writing to him; an experienced, sagacious lady; quite aware, in spite of her affection for him, of his faults and weaknesses; solicitous that he should avoid the dangers of an embarrassing entanglement; his happiness being the only consideration of importance. On others it might have been a queen laying her immutable commands upon some loyal subject, sworn to her service. Part of it might have been written by a laughing philosopher who had learnt the folly of taking life too seriously, knowing that all things pass: that the tears of to-day will be remembered with a smile. And a part of it was the unconsidered language of a loving woman. And those were the pages that he kissed. The conductor seemed impatient. Joan sprang upon the step and waved her hand.!

The medical staff consisted of a Dr. Poujoulet and two assistants. The authorities were always promising to send him more help, but it never arrived. One of the assistants, a Monsieur Dubos, a little man with a remarkably big beard, was a chemist, who, at the outbreak of the war, had been on the verge, as he made sure, of an important discovery in connection with colour photography. Almost the first question he asked Joan was could she speak German. Finding that she could, he had hurried her across the yard into a small hut where patients who had borne their operation successfully awaited their turn to be moved down to one of the convalescent hospitals at the base. Among them was a German prisoner, an elderly man, belonging to the Landwehr; in private life a photographer. He also had been making experiments in the direction of colour photography. Chance had revealed to the two men their common interest, and they had been exchanging notes. The German talked a little French, but not sufficient; and on the day of Joan’s arrival they had reached an impasse that was maddening to both of them. Joan found herself up against technical terms that rendered her task difficult, but fortunately had brought a dictionary with her, and was able to make them understand one another. But she had to be firm with both of them, allowing them only ten minutes together at a time. The little Frenchman would kneel by the bedside, holding the German at an angle where he could talk with least danger to his wound. It seemed that each was the very man the other had been waiting all his life to meet. They shed tears on one another’s neck when they parted, making all arrangements to write to one another. Joan replaced the letter in its envelope, and laid it down upon the desk. Unconsciously a smile played about her lips.

“Are they yours?” she asked. She had never connected them with the works, some half a mile away. Though had she been curious, she might have learnt that they were known as “Allway’s Folly.” “Oh, sufficiently,” Joan answered. The one thing her mother had done for her had been to talk French with her when she was a child; and at Girton she had chummed on with a French girl, and made herself tolerably perfect. “What are you making?” asked Joan.