“Simply because as I walked away last night, after thinking I heard a shot, the light went up in that room.”

“How curious! I don’t know who has that room, but I can find out by asking Bundle. Perhaps they heard the shot?”

“If so, they haven’t come forward to say so. I understood from Battle that nobody in the house heard the shot fired. It’s the only clue of any kind that I’ve got, and I dare say it’s a pretty rotten one, but I mean to follow it up for what it’s worth.”

“It’s curious, certainly,” said Virginia thoughtfully.

They had arrived at the boathouse by the lake, and had been leaning against it as they talked.

“And now for the whole story,” said Anthony. “We’ll paddle gently about on the lake, secure from the prying ears of Scotland Yard, American visitors, and curious housemaids.”