"It's the Chinese charm that they found tied round Mercy's neck when she was brought to the hospital. She showed it me one Sunday evening, and I held it in my hand and looked at it so carefully."

"Where did your friend get her charm?" asked Dr. Severn quickly.

"It was fastened round her neck when she was a baby. A Chinese woman crawled with her to the hospital, because she was so wounded she was dying. Not Mercy, I mean, but the poor woman. Mercy wasn't hurt at all. They adopted her at the hospital, and then she was brought to England, and came to Miss Kaye's, but nobody's ever found out yet who she is. Isn't it just like a storybook?" said Sylvia, who loved to bring forward the romantic side of her friend's history.

"How long ago is it since this happened?" enquired Dr. Severn with a curious strained tone in his voice which neither of the children noticed.

"About sixteen years. Mercy is nearly seventeen."

"Is that her true name?"

"No. Nobody knew her real name, so they called her Mercy Ingledew. She had on Chinese clothes, and the nurse thought the locket must be a Chinese charm too. She hadn't a single English thing that anyone could tell her by. Wasn't it a pity?"

"A great pity, if her friends are alive to claim her."

"We don't know whether they are or not," said Sylvia. "I'm always trying to find them, but Miss Kaye says I'm not to talk to Mercy about it, because it's no use to keep raising false hopes, and we must all be very kind to her, to make up for her not having a father and mother of her own. It's funny her little charm should be just the same as yours, though, isn't it? Did this one come from China too? I should have liked a story about it."

"Some other day, perhaps," said Dr. Severn, rising hastily and walking to the window. "Let us go out and find the boys. The sky looks so threatening, I'm afraid there's a thunderstorm brewing, and I had better send you home before it begins."