"Now he is gone, it is your turn to get out," said Mme. Bonacieux. "Courage, my friend, but above all, prudence, and think what you owe to the queen."

"To her and to you!" cried d'Artagnan. "Be satisfied, beautiful Constance. I shall become worthy of her gratitude; but shall I likewise return worthy of your love?"

The young woman only replied by the beautiful glow which mounted to her cheeks. A few seconds afterward d'Artagnan also went out enveloped in a large cloak, which ill-concealed the sheath of a long sword.

Mme. Bonacieux followed him with her eyes, with that long, fond look with which he had turned the angle of the street, she fell on her knees, and clasping her hands, "Oh, my God," cried she, "protect the queen, protect me!"

D'Artagnan went straight to M. de Treville's. He had reflected that in a few minutes the cardinal would be warned by this cursed stranger, who appeared to be his agent, and he judged, with reason, he had not a moment to lose.

The heart of the young man overflowed with joy. An opportunity presented itself to him in which there would be at the same time glory to be acquired, and money to be gained; and as a far far higher encouragement, it brought him into close intimacy with a woman he adored. This chance did, then, for him at once more than he would have dared to ask of Providence.

M. de Treville was in his saloon with his habitual court of gentlemen. D'Artagnan, who was known as a familiar of the house, went straight to his office, and sent word that he wished to see him on something of importance.

D'Artagnan had been there scarcely five minutes when M. de Treville entered. At the first glance, and by the joy which was painted on his countenance, the worthy captain plainly perceived that something new was on foot.

All the way along d'Artagnan had been consulting with himself whether he should place confidence in M. de Treville, or whether he should only ask him to give him CARTE BLANCHE for some secret affair. But M. de Treville had always been so thoroughly his friend, had always been so devoted to the king and queen, and hated the cardinal so cordially, that the young man resolved to tell him everything.

"Did you ask for me, my good friend?" said M. de Treville.

'Yes, monsieur," said d'Artagnan, lowering his voice, "and you will pardon me, I hope, for having disturbed you when you know the importance of my business."

"Speak, then, I am all attention."

"It concerns nothing less", said d'Artagnan, "than the honor, perhaps the life of the queen."

"What did you say?" asked M. de Treville, glancing round to see if they were surely alone, and then fixing his questioning look upon d'Artagnan.

"I say, monsieur, that chance has rendered me master of a secret--"

"Which you will guard, I hope, young man, as your life."

"But which I must impart to you, monsieur, for you alone can assist me in the mission I have just received from her Majesty."

"Is this secret your own?"

"No, monsieur; it is her Majesty's."

"Are you authorized by her Majesty to communicate it to me?"

“A touch, Watson—an undeniable touch!” said he. “I feel a foil as quick and supple as my own. He got home upon me very prettily that time. So his name was Sherlock Holmes, was it?”

“Yes, sir, that was the gentleman’s name.”

“Excellent! Tell me where you picked him up and all that occurred.”

“He hailed me at half-past nine in Trafalgar Square. He said that he was a detective, and he offered me two guineas if I would do exactly what he wanted all day and ask no questions. I was glad enough to agree. First we drove down to the Northumberland Hotel and waited there until two gentlemen came out and took a cab from the rank. We followed their cab until it pulled up somewhere near here.”

“This very door,” said Holmes.

“Well, I couldn’t be sure of that, but I dare say my fare knew all about it. We pulled up half-way down the street and waited an hour and a half. Then the two gentlemen passed us, walking, and we followed down Baker Street and along —”

“I know,” said Holmes.

“Until we got three-quarters down Regent Street. Then my gentleman threw up the trap, and he cried that I should drive right away to Waterloo Station as hard as I could go. I whipped up the mare and we were there under the ten minutes. Then he paid up his two guineas, like a good one, and away he went into the station. Only just as he was leaving he turned round and he said: ‘It might interest you to know that you have been driving Mr. Sherlock Holmes.’ That’s how I come to know the name.”

“I see. And you saw no more of him?”

“Not after he went into the station.”

“And how would you describe Mr. Sherlock Holmes?”

The cabman scratched his head. “Well, he wasn’t altogether such an easy gentleman to describe. I’d put him at forty years of age, and he was of a middle height, two or three inches shorter than you, sir. He was dressed like a toff, and he had a black beard, cut square at the end, and a pale face. I don’t know as I could say more than that.”

“Colour of his eyes?”

“No, I can’t say that.”

“Nothing more that you can remember?”

“No, sir; nothing.”

“Well, then, here is your half-sovereign. There’s another one waiting for you if you can bring any more information. Good night!”

“Good night, sir, and thank you!”

John Clayton departed chuckling, and Holmes turned to me with a shrug of his shoulders and a rueful smile.

“Snap goes our third thread, and we end where we began,” said he. “The cunning rascal! He knew our number, knew that Sir Henry Baskerville had consulted me, spotted who I was in Regent Street, conjectured that I had got the number of the cab and would lay my hands on the driver, and so sent back this audacious message. I tell you, Watson, this time we have got a foeman who is worthy of our steel. I’ve been checkmated in London. I can only wish you better luck in Devonshire. But I’m not easy in my mind about it.”