“Go on, Miss Westbury. Even if it seems to tell against him, go on. We cannot say what it may lead to.”

“Indeed, I have nothing more to tell. Once or twice it seemed to me that he was on the point of telling me something. He spoke one evening of the importance of the secret, and I have some recollection that he said that no doubt foreign spies would pay a great deal to have it.”

My friend’s face grew graver still.

“Anything else?”

“He said that we were slack about such matters⁠—that it would be easy for a traitor to get the plans.”

“Was it only recently that he made such remarks?”

“Yes, quite recently.”

“Now tell us of that last evening.”