"I never suspected anything," returned Marjorie, bursting into tears.

The poor child was thoroughly unnerved by her interview with the detective, and the Principal's reproach seemed to put the finishing touch to the whole affair. In Winifrede's study afterwards she sobbed till her eyes were red slits.

"Never mind," comforted Winifrede. "After all, things might have been worse. Be thankful you didn't lend her your brother's uniform. It's as clear as daylight she didn't want it for charades. It would be easy for a German prisoner to escape disguised as a British officer. It might have got your brother into most serious trouble."

"It was Dona who wouldn't let me take it," choked Marjorie. "She said at the time that she didn't trust Chrissie. I've been a blind idiot all along!"

"We were none of us clever enough to find her out."

It was just about a week after this that a letter arrived at Brackenfield, addressed to Marjorie in Chrissie's handwriting. It bore a Dutch stamp and postmark, and had been opened by the censor. Mrs. Morrison perused it first in private, then, calling Marjorie to the study, handed it to her to read. It bore no address or date, and ran thus:—

"My dear Marjorie,

"This letter is to say a last good-bye to you, for you will never hear from me or of me again. By now you will have found out all. Believe me that what I did was not by my own wish. I hated and loathed it all the time, but I was forced by others to do it. I cannot tell you how wretched I was, and how I envied you, who had no dreadful secret to keep. We are going back to our own people" (here a portion of the letter was blackened by the censor). "It was all for his sake" (again a portion was erased). "I want to tell you, Marjorie, how I have loved you. You have been the one bright spot in my life, and I can never forget your kindness. I have your portrait inside my locket, and I shall wear it always, and have it buried with me in my coffin. Try to think of me as if I were already dead, and forgive me if you can.

"From your still loving friend,
"Chrissie."

Marjorie put down the letter with a shaking hand.