"We shall leave London at midnight," he went on, "and drive through the whole of the night. I, also, am an expert chauffeur, and we can relieve each other."

"Thumbwood can drive, too. Of course we take him with us?"

"He will be of the greatest assistance. Now, Sir John, if you want to take a little sleep, now is the time. I should like to consult with your servant, if I may, and have a chat with him. We shall have a good deal to do with one another."

Strangely enough, I did feel drowsy, despite my excitement. A couple of hours' sleep would refresh me wonderfully, and I knew it.

"Very well; I think it is a good suggestion. Say for two hours."

"By all means. I will carry out some other arrangements meanwhile. You shall have full explanations later on, and I thank you sincerely for the confidence you have reposed in me."

While we were talking we had left the room and crossed the hall.

"A pleasant sleep," he said, politely opening the door for me. "We will go and have a look at Major Helzephron later on."

"What?" I shouted.