the indisputable proof.

The officer, however, decided upon that act. He brought his right hand, which held the rosary-bead, and his left, which held the trinket, together. The hands hesitated, felt about and stopped. The contact was made.

The projections and indentations of the broken stones corresponded precisely. Each protruding part found a space to fit it. The two half amethysts were the two halves of the same amethyst. When joined, they formed one and the same bead.

There was a long pause, laden with excitement and mystery. Then, speaking in a low voice:

"I do not know either exactly where this trinket comes from," Captain Belval said. "Ever since I was a child, I used to see it among other things of trifling value which I kept in a cardboard box: watch-keys, old rings, old-fashioned seals. I picked out these trinkets from among them two or three years ago. Where does this one come from? I don't know. But what I do know . . ."

He had separated the two pieces and, examining them carefully, concluded:

"What I do know, beyond a doubt, is that the largest bead in this rosary came off one day and broke; and that the other, with its setting, went to form the trinket which I now have. You and I therefore possess the two halves of a thing which somebody else possessed twenty years ago."

He went up to her and, in the same low and rather serious voice, said:

"You protested just now when I declared my faith in destiny and my certainty that events were leading us towards each other. Do you still deny it? For, after all, this is either an accident so extraordinary that we have no right to admit it or an actual fact which proves that our two lives have already touched in the past at some mysterious point and that they will meet again in the future, never to part. And that is why, without waiting for the perhaps distant future, I offer you to-day, when danger hangs over you, the support of my friendship. Observe that I am no longer speaking of love but only of friendship. Do you accept?"

She was nonplussed and so much perturbed by that miracle of the two broken amethysts, fitting each other exactly, that she appeared not to hear Belval's voice.

"Do you accept?" he repeated.

After a moment she replied:

"No."

"Then the proof which destiny has given you of its wishes does not satisfy you?" he said, good-humoredly.

"We must not see each other again," she declared.

"Very well. I will leave it to chance. It will not be for long. Meanwhile, I promise to make no effort to see you."

"Nor to find out my name?"

"Yes, I promise you."

"Good-by," she said, giving him her hand.

"Au revoir," he answered.

She moved away. When she reached the door, she seemed to hesitate. He was standing motionless by the chimney. Once more she said:

"Good-by."

"Au revoir, Little Mother Coralie."

Then she went out.

Only when the street-door had closed behind her did Captain Belval go to one of the windows. He saw Coralie passing through the trees, looking quite small in the surrounding darkness. He felt a pang at his heart. Would he ever see her again?

"Shall I? Rather!" he exclaimed. "Why, to-morrow perhaps. Am I not the favorite of the gods?"

And, taking his stick, he set off, as he said, with his wooden leg foremost.

That evening, after dining at the nearest restaurant, Captain Belval went to Neuilly. The home run in connection with the hospital was a pleasant villa on the Boulevard Maillot, looking out on the Bois de Boulogne. Discipline was not too strictly enforced. The captain could come in at any hour of the night; and the man easily obtained leave from the matron.

"Is Ya-Bon there?" he asked this lady.

"Yes, he's playing cards with his sweetheart."

"He has the right to love and be loved," he said. "Any letters for me?"

"No, only a parcel."

"From whom?"

"A commissionaire brought it and just said that it was 'for Captain Belval.' I put it in your room."

The officer went up to his bedroom on the top floor and saw the parcel, done up in paper and string, on the table. He opened it and discovered a box. The box contained a key, a large, rusty key, of a shape and manufacture that were obviously old.

What could it all mean? There was no address on the box and no mark. He presumed that there was some mistake which would come to light of itself; and he slipped the key into his pocket.

"Enough riddles for one day," he thought. "Let's go to bed."

But when he went to the window to draw the curtains he saw, across the trees of the Bois, a cascade of sparks which spread to some distance in the dense blackness of the night. And he remembered the conversation which he had overheard in the restaurant and the rain of sparks mentioned by the men who were plotting to kidnap Little Mother Coralie. . . .

CHAPTER III
THE RUSTY KEY

When Patrice Belval was eight years old he was sent from Paris, where he had lived till then, to a French boarding-school in London. Here he remained for ten years. At first he used to hear from his father weekly. Then, one day, the head-master told him that he was an orphan, that provision had been made for the cost of his education and that, on his majority, he would receive through an English solicitor his paternal inheritance, amounting to some eight thousand pounds.

Two hundred thousand francs could never be enough for a young man who soon proved himself to possess expensive tastes and who, when sent to Algeria to perform his military service, found means to run up twenty thousand francs of debts before coming into his money. He therefore started by squandering his patrimony and, having done so, settled down to work. Endowed with an active temperament and an ingenious brain, possessing no special vocation, but capable of anything that calls for initiative and resolution, full of ideas, with both the will and the knowledge to carry out an enterprise, he inspired confidence in others, found capital as he needed it and started one venture after another, including electrical schemes, the purchase of rivers and waterfalls, the organization of motor services in the colonies, of steamship lines and of mining companies. In a few years he had floated a dozen of such enterprises, all of which succeeded.

The war came to him as a wonderful adventure. He flung himself into it with heart and soul. As a sergeant in a colonial regiment, he won his lieutenant's stripes on the Marne. He was wounded in the calf on the 15th of September and had it amputated the same day. Two months after, by some mysterious wirepulling, cripple though he was, he began to go up as observer in the aeroplane of one of our best pilots. A shrapnel-shell put an end to the exploits of both heroes on the 10th of January. This time, Captain Belval, suffering from a serious wound in the head, was discharged and sent to the hospital in the Avenue des Champs-Élysées. About the same period, the lady whom he was to call Little Mother Coralie also entered the hospital as a nurse.

There he was trepanned. The operation was successful, but complications remained. He suffered a good deal of pain, though he never uttered a complaint and, in fact, with his own good-humor kept up the spirits of his companions in misfortune, all of whom were devoted to him. He made them laugh, consoled them and stimulated them with his cheeriness and his constant happy manner of facing the worst positions.

Not one of them is ever likely to forget the way in which he received a manufacturer who called to sell him a