“Of course, sir, many people come to visit Mr. De Gex. Horton would know them, but I don’t. When the master is in town the servants are here, and I’m down in Cornwall at the castle.”

“Then you are only here as caretaker when the family is away?”

“That’s it, sir,” he said. “But what is the mystery about this young lady? You said you knew Mr. De Gex, and yet you wanted to look over the house.”

“Yes,” I responded with a laugh. “I have my own object—to clear up the mystery of Mr. De Gex’s niece.”

“Well, as far as I know, he has no niece! But you could easily find out, I suppose!”

The man was evidently no fool.

“Of course I don’t know who comes here, or who stays here when the family is in town,” he went on. “I simply come up and look after the place with my wife.”

“Then you were away in Swanage during the first week of November?” I asked very seriously.

“Yes, we went down on the last day of October, and we were back here in the middle of November. My wife’s sister was very ill, and her husband didn’t expect her to live. So I remember the dates only too well.”