"What vapour is that?" he asked.

"Vapour?"

"Something that crossed me?"

"I am conscious of nothing; there can be nothing here. Take up the pen and finish. Hurry, hurry!"

As if his memory were impaired, or his faculties disordered, the prisoner made an effort to rally his attention. As he looked at Carton with clouded eyes and with an altered manner of breathing, Carton--his hand again in his breast--looked steadily at him.

"Hurry, hurry!"

The prisoner bent over the paper, once more.

"'If it had been otherwise;'" Carton's hand was again watchfully and softly stealing down; "'I never should have used the longer opportunity. If it had been otherwise;'" the hand was at the prisoner's face; "'I should but have had so much the more to answer for. If it had been otherwise--'" Carton looked at the pen and saw it was trailing off into unintelligible signs.

Carton's hand moved back to his breast no more. The prisoner sprang up with a reproachful look, but Carton's hand was close and firm at his nostrils, and Carton's left arm caught him round the waist. For a few seconds he faintly struggled with the man who had come to lay down his life for him; but, within a minute or so, he was stretched insensible on the ground.

Quickly, but with hands as true to the purpose as his heart was, Carton dressed himself in the clothes the prisoner had laid aside, combed back his hair, and tied it with the ribbon the prisoner had worn. Then, he softly called, "Enter there! Come in!" and the Spy presented himself.

"You see?" said Carton, looking up, as he kneeled on one knee beside the insensible figure, putting the paper in the breast: "is your hazard very great?"

"Mr. Carton," the Spy answered, with a timid snap of his fingers, "my hazard is not _that_, in the thick of business here, if you are true to the whole of your bargain."

"Don't fear me. I will be true to the death."

"You must be, Mr. Carton, if the tale of fifty-two is to be right. Being made right by you in that dress, I shall have no fear."

"Have no fear! I shall soon be out of the way of harming you, and the rest will soon be far from here, please God! Now, get assistance and take me to the coach."

"You?" said the Spy nervously.

"Him, man, with whom I have exchanged. You go out at the gate by which you brought me in?"

"Of course."