"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 higher encouragement, it brought him into close 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?"

The whole steep slope was covered with gray circular rings of stone, a score of them at least.

“What are they? Sheep-pens?”

“No, they are the homes of our worthy ancestors. Prehistoric man lived thickly on the moor, and as no one in particular has lived there since, we find all his little arrangements exactly as he left them. These are his wigwams with the roofs off. You can even see his hearth and his couch if you have the curiosity to go inside.

“But it is quite a town. When was it inhabited?”

“Neolithic man—no date.”

“What did he do?”

“He grazed his cattle on these slopes, and he learned to dig for tin when the bronze sword began to supersede the stone axe. Look at the great trench in the opposite hill. That is his mark. Yes, you will find some very singular points about the moor, Dr. Watson. Oh, excuse me an instant! It is surely Cyclopides.”

A small fly or moth had fluttered across our path, and in an instant Stapleton was rushing with extraordinary energy and speed in pursuit of it. To my dismay the creature flew straight for the great mire, and my acquaintance never paused for an instant, bounding from tuft to tuft behind it, his green net waving in the air. His gray clothes and jerky, zigzag, irregular progress made him not unlike some huge moth himself. I was standing watching his pursuit with a mixture of admiration for his extraordinary activity and fear lest he should lose his footing in the treacherous mire, when I heard the sound of steps, and turning round found a woman near me upon the path. She had come from the direction in which the plume of smoke indicated the position of Merripit House, but the dip of the moor had hid her until she was quite close.

I could not doubt that this was the Miss Stapleton of whom I had been told, since ladies of any sort must be few upon the moor, and I remembered that I had heard someone describe her as being a beauty. The woman who approached me was certainly that, and of a most uncommon type. There could not have been a greater contrast between brother and sister, for Stapleton was neutral tinted, with light hair and gray eyes, while she was darker than any brunette whom I have seen in England—slim, elegant, and tall. She had a proud, finely cut face, so regular that it might have seemed impassive were it not for the sensitive mouth and the beautiful dark, eager eyes. With her perfect figure and elegant dress she was, indeed, a strange apparition upon a lonely moorland path. Her eyes were on her brother as I turned, and then she quickened her pace towards me. I had raised my hat and was about to make some explanatory remark, when her own words turned all my thoughts into a new channel.

“Go back!” she said. “Go straight back to London, instantly.”

I could only stare at her in stupid surprise. Her eyes blazed at me, and she tapped the ground impatiently with her foot.

“Why should I go back?” I asked.

“I cannot explain.” She spoke in a low, eager voice, with a curious lisp in her utterance. “But for God’s sake do what I ask you. Go back and never set foot upon the moor again.”