“Four hundred, at a pistole each, four hundred pistoles.”

“Yes,” interposed Porthos, “four hundred pistoles; but who is to make four hundred pistoles?”

“A pistole is not enough,” said D’Artagnan, “‘tis worth a louis.”

“What is worth a louis?”

“Four hundred, at a louis each, make four hundred louis.”

“Four hundred?” said Porthos.

“Yes, there are two hundred of them, and each of them will need two, which will make four hundred.”

“But four hundred what?”

“Listen!”