The voice was Dr. Fulton's.

"What is it?" demanded Sir Charles, from behind me, coming to an abrupt halt.

"One moment, Venner, where are you?"

"Here!"

Sir Charles Venner returned towards the house, and the two men met at the very angle of the path, within six feet of my nose. I hugged the tree-trunk, and waited, hardly daring to breathe.

"Could you strain a point, Venner, and operate to-morrow night?" asked Dr. Fulton in a pleading voice.

"No, old chap, I can't. You know my rule. I must give myself three days between each, for the sake of my nerve."

"Just for once!"

"Impossible, Fulton. I wonder that you ask me. I have myself to consider as well as the cause. We may succeed or we may not. But I am hanged if I deliberately risk destroying my own health for anything or anyone. I consider that I do quite enough for the cause as it is."

"You do, Venner, you do; but just for once do oblige Marion. She begged me to ask you. You see, the fact is, Cavanagh is cranky."