“Do you propose to me to do so, D’Artagnan?”

“Decidedly and honestly.”

“On whose side?” asked Athos, fixing his clear, benevolent glance on the countenance of the Gascon.

“Ah, devil take it, you speak in earnest — — ”

“And must have a definite answer.

Listen, D’Artagnan. There is but one person, or rather, one cause, to whom a man like me can be useful — that of the king.”

“Exactly,” answered the musketeer.

“Yes, but let us understand each other,” returned Athos, seriously. “If by the cause of the king you mean that of Monsieur de Mazarin, we do not understand each other.”