THE THIRTY-NINE STEPS
"That is not difficult," the Frenchman replied. "A good spy is trained to have a photographic memory. Like your own Macaulay. You noticed he said nothing, but went through these papers again and again. I think we may assume that he has every detail stamped on his mind. When I was younger I could do the same trick."
"Well, I suppose there is nothing for it but to change the plans," said Sir Walter ruefully.
Whittaker was looking very glum. "Did you tell Lord Alloa what had happened?" he asked. "No! I can't speak with absolute assurance, but I'm nearly certain we can't make any serious change unless we alter the geography of England."
"Another thing must be said," it was Royer who spoke. "I talked freely when that man was here. I told something of the military plans of my Government. I was permitted to say so much. But that information would be worth many millions to our enemies. No, my friends, I see no other way. The man who
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