At this juncture in the conversation, Onoye announced a visitor who proved to be a detective. He was a quiet, self-contained young Japanese who spoke excellent English. He had been sent out in a motor car by the Chief of Police to find out all he could from the Americans regarding Mme. Fontaine.
The Widow of Shanghai, he informed them, was the child of a Russian father and a Japanese mother. She was considered to be one of the most accomplished and brilliant spies in the Orient and could assume almost any disguise and speak most languages. It was a pity a woman of such wonderful talents should stoop to work like that, and the strange part of it was that she was sometimes treacherous to Russia and in favor of Japan: so that it was difficult to tell for which side she worked. Just now her sympathies were with Russia, since she was trying to get plans for harbor defenses in Japan. The Chief of Police wished to thank Miss Brown in behalf of the City of Tokyo for driving the so-called Mme. Fontaine out of town. She had entered it so quietly that until that very morning it was not known that Mme. Fontaine and the famous Russian spy were one and the same person.
"Of course it was she who was in here the night of your birthday party.
Papa," said Billie. "I must have shot two people instead of one."
This was actually the case, as Onoye explained to her later. Onoye had hidden herself behind the curtain that night to watch the couples strolling about in the moonlight. Mme. Fontaine came very swiftly into the room and blew out the lights. She carried a little electric dark lantern. Onoye was too frightened to make her presence known, and had crept along the edge of the room hoping to reach the door. Then Billie had come in and somehow they had all drifted together in the dark and the pistol had gone off. The bullet must have pierced Mme. Fontaine's arm and lodged in Onoye's wrist. How she managed to hide the wound with a scarf until she got her long wrap from one of the bedrooms was a marvel to them all.
"Anyhow the mystery is all cleared away now," cried Nancy joyfully. "I suppose you must have thought strange things about me, Mr. Campbell?"
"We had every reason to think them, Miss Nancy, but this loyal young person here wouldn't let us. It looked like some pretty convincing evidence for a while, but she wouldn't budge from the stand she had taken."
Once again the two friends embraced. They were radiantly happy. It was just as if Nancy had died and come to life again.
"I think I've learned a good lesson," she admitted at last. "It all happened because I wanted to be silly and romantic and meet people in the garden and write notes."
"People?" asked Mary.
Nancy laughed and dimpled in her old charming way and everybody laughed, even the reserved young detective. Old Nedda, who had followed them into the room, carne tottering over to where Nancy sat beside Billie. The aged animal whined and wagged her tail, as if she, too, wished to take part in the general thanksgiving.