Catherick’s desire to conceal her visit to Blackwater Park from Sir Percival’s knowledge recurred to my memory the moment he put that last question, and I half doubted the discretion of answering it; but in my anxiety to quiet the general alarm, I had thoughtlessly advanced too far to draw back, except at the risk of exciting suspicion, which might only make matters worse. There was nothing for it but to answer at once, without reference to results.

“Yes,” I said. “The housekeeper knew. She told me it was

Mrs.

Catherick’s dog.”