"Eighty thousand dollars!" said Pierre, gazing after the retreating horseman. "That's a nice little sum to be divided among six of us."

This remark will show whether or not the robber intended to abide by the promises he had just made to Arthur Vane; and, while we are on this subject, it may not be amiss to say, that the scheme Arthur had proposed, was one on which the robber had been meditating for many days. During the time he had lived in the mountains, he had kept his brain busy, and had been allowed ample opportunity to decide upon his future operations. He had been astonished and enraged at his failure to secure the twelve thousand dollars, and to make Frank Nelson a prisoner, and he had resolved to make amends for his defeat by capturing Frank and all his companions, including Arthur Vane. Pierre had plenty of friends to assist him, but there was one question that troubled him, and presented an obstacle that he could see no way to overcome; and that was, how to capture all the boys at once. That must be done, or his plan would fail. He could get his hands upon Arthur Vane at any time; but the others were like birds on the wing—here to-day, and miles away to-morrow—and Pierre did not know where to find them. Now, however, the difficulty was removed. Frank and his friends were going on a hunting expedition, Arthur would ascertain when they were going to start, and what road they intended to take, and when the day arrived, the robber could call in his men, who were employed on the neighboring ranchos, and capture the boys without the least trouble. Pierre was very glad that Arthur had got angry at Frank.

Meanwhile Frank, Archie, and Johnny, all unconscious of the plans that were being formed against them, enjoyed themselves to the utmost, and wasted a good deal of time every day in laughing over the incidents that had transpired during their ride to Captain Porter's ranch. Archie, especially, had a great deal to say about it. He had an accomplishment, of which we have never before had occasion to speak: he was a first-class mimic; and he took no little pride in showing off his powers. He could imitate the brogue of an Irishman the broken English of a Dutchman, or the nasal twang of a Yankee, to perfection; and one day, while he was in the barn saddling his horse, he carried on a lengthy conversation with Bob Kelly (who was on the outside of the building), about some runaway cattle, and the old trapper thought all the while that he was talking to his chum, Dick Lewis. Now Archie had a new subject to practice upon. He laid himself out to personate Arthur Vane; and he not only successfully imitated that young gentleman's pompous style of talking, and his dignified manner of riding and walking, but even the tone of his voice. He criticised Frank and Johnny continually, and made them laugh, till their jaws ached, by recounting imaginary adventures on the burning sands of Patagonia, and among the icebergs and polar bears of India.

The day following the one on which Arthur Vane visited the robber in the mountains, found the three boys on the back porch of Mr. Winters's rancho, making preparations for their hunting expedition. Frank was cleaning his rifle, and Archie and Johnny were repairing an old pack-saddle, in which they intended to carry their provisions and extra ammunition. Archie was seated on the floor, with an awl in one hand, and a piece of stout twine in the other; and, while he was working at the pack-saddle, his tongue was moving rapidly.

"I am young in years, fellows," he was saying, "but I am aged in experience. If I had my rights, I should long ago have been gray-headed. I have seen thrilling times in my life, and have been the hero of adventures, that, were I to relate them to you, would make each particular hair of your heads stand on end, like the quills of a punched hedge-hog. I am—if you will kindly permit me to use a slang expression—an old hand at the business of hunting and trapping, and have accomplishments in which I can not be beaten. Among them, stands my ability to whip a grizzly bear in a fair fight, with no weapon but my knife. I have hunted wild gorillas in the streets of New York City; have"—

"Good morning, fellows!"

Archie brought the story of his adventures to a sudden close, and, looking over his shoulder, saw Arthur Vane standing at the end of the porch. The boys had never expected him to call upon them again, and Archie and Johnny were too surprised to speak; but Frank, who always kept his wits about him, returned Arthur's greeting, and invited him to occupy the chair he pushed toward him. He was not at all pleased to see the visitor, but he was too much of a gentleman to show it.

One would suppose, that the remembrance of what had happened, three days before, would have caused Arthur some embarrassment; but such was not the case. On the contrary, he was as dignified as ever, and seemed to be perfectly at his ease. Frank and his friends were considerate enough to refrain from making any allusions to the fright he had sustained, but Arthur brought the subject up himself.

"I received your note," said he, "and also the articles you were kind enough to send me; and I am here now to say, that I feel heartily ashamed of myself. From some cause or another, that I could not explain if I should try, I was extremely nervous that day; but I may, some time, have an opportunity to show you that I am not as much of a coward as I know you now believe me to be."

Arthur remained at the rancho all that day, sitting down at the same, table, and eating his dinner with the boys he was about to betray into the hands of the robbers; and, when he went home that night, he had asked, and received, permission to accompany them to the mountains. Their consent had been given reluctantly, and with very bad grace; but they could see no way to get around it. Arthur was a boy with whom they did not care to associate; but he had done them no injury, and they could not bring themselves to refuse his request.