“There was no great difficulty in that, for you saw me at work.”

“Wait a minute; I also guessed something else, — that you were fortifying Belle-Isle by M. Fouquet’s orders.”

“That’s true.”

“But even that is not all. Whenever I feel myself in trim for guessing, I do not stop on my road; and so I guessed that M.

Fouquet wished to preserve the most absolute secrecy respecting these fortifications.”

“I believe that was his intention, in fact,” said Porthos.

“Yes, but do you know why he wished to keep it secret?”

“In order it should not become known, perhaps,”