“Ah!” thought Porthos, “the man Aramis wants me to strangle.”

They both looked searchingly at the young man, who misunderstood the meaning of that inquisition.

“Do you doubt my word?” he said. “In that case I can give you proofs.”

“No, sir,” said D’Artagnan; “and we place ourselves at your orders.”

“Well, gentlemen,” resumed Mordaunt, “we must set out without delay, to-day is the last day granted me by the cardinal. My ship is ready, and had you not come I must have set off without you, for General Cromwell expects my return impatiently.”

“So!” thought the lieutenant, “’tis to General Cromwell that our dispatches are addressed.”

“Have you no letter for him?” asked the young man.

“I have one, the seal of which I am not to break till I reach London; but since you tell me to whom it is addressed, ’tis useless to wait till then.”

D’Artagnan tore open the envelope of the letter. It was directed to “Monsieur Oliver Cromwell, General of the Army of the English Nation.”

“Ah!” said D’Artagnan; “a singular commission.”