The days that followed were days of stirring adventure to the Rob Roy Clan, and days of continuous and surprising misery to Angus Niel. Never in his history as gamekeeper of Glen Cairn had he had such experiences. The very trees in the woods seemed to be bewitched. Wherever he went he was followed by some mysterious power that seemed to know his every movement. If he killed any game, the fact was advertised and the place marked by signs in blue chalk. Not only that, but the very path of his approach to the spot was marked by pointing arrows and some such legend as "This way to the glen where Angus Niel killed a deer" would decorate a neighboring rock. On other rocks appeared pertinent questions addressed to him. "How much did you get for the stag?" was one of them, and there were also queries as to where he found the best market for game. He was kept so busy searching the forest for these incriminating signs and rubbing them out, that he could not follow his regular rounds. Even this did not avail, for if he erased them on one day, it was but a matter of time before the letters appeared again as fresh and blue as ever. Nor was this all. He was haunted by a wailing voice which reached him even in the remote fastnesses of the forest. He was sure to hear it if he ventured into the neighborhood of the waterfall, and he usually avoided that region as if it harbored a pestilence.

Once late in the afternoon he shot two hares and hid them under some rocks, intending to carry them across the lake in the morning, but when he went for them, they had disappeared altogether, and above the place where they had been was written in blue chalk, "Sacred to the memory of two hares, killed and hidden here by Angus Niel on June 12th."

When he saw this epitaph, Angus's hair really stood on end with fright, and on the day he found that the boat was gone, leaving no trace, he became absolutely terror-stricken. He sought for it behind every rock and in every likely nook about the lake, consuming days in the quest, and was appalled on his next trip thither to find all the incidents of his search faithfully recorded on the rocks, each one signed with the mystic initials R. R. C.

It took ingenuity, persistence, and some degree of danger on the part of the clan to accomplish these things, but one could depend upon finding these qualities in any Campbell or McGregor, and Sandy, having been made a blood brother, faithfully lived up to the duties it entailed. He became an expert detective and sleuth-hound, discovering and reporting Angus's movements each day to the enterprising Clan and its resourceful Chief.

At Alan's suggestion, the Clan took for its motto "We must be canny," and canny they certainly were. They even changed their programme from day to day, and in this way just when Angus felt he was about to discover his tormentors and know if they were human and not witches, they found some new method of annoyance and he was all at sea again.

Once they gave him a respite of nearly a week and Angus, having erased many signs and finding no new ones, was beginning to think his troubles were over, when suddenly arrows bearing bits of paper inviting him to visit the fall would suddenly drop at his feet. It had taken the Clan nearly all their spare time for the week to make the bows and arrows, by which this wonder was accomplished. Meanwhile they had lived like lords, feasting upon trout and the generous store of provisions with which Alan continued to supply the cave. They even began to see how it was possible for Rob Roy and his men to live upon forest fare, for the pool below the fall was a wonderful fishing-hole, and small game was plentiful if they had cared to become poachers themselves.

On one red-letter day, they roasted the two hares which Angus had killed, and cooked potatoes in the ashes. Each day was filled with fresh adventures, and the wild outdoor life agreed with Alan so well that his thin cheeks began to fill out and glow with healthy color and it was not long before he looked as sturdy and strong as Jock himself.

It was curious that what Alan gained in flesh and spirits, Angus Niel at the same time seemed to lose. He was so worried by these strange visitations that his round eyes took on a haunted expression, and Sandy observed that he kept looking over his shoulder as if he thought some one were following him, even when he walked the village streets.

He dared not stay away from the forest lest others should discover the dreadful blue signs before he did, and at the same time he was afraid to go in. He swung like a pendulum between these two difficulties and grew daily more nervous and unhappy. By the end of June he had lost ten pounds of flesh as well as the money he might have made out of poaching and selling the game. By the middle of July he was so haggard that people began to remark on his appearance. There seemed no way out of his troubles but to lie about them, and soon wild stories were circulated through the village about the haunted forest and its dangers.

Women were warned not to let the children stray into the woods lest they be carried away by witches or water cows, and it was also reported that a gang of poachers of a particularly blood-thirsty character infested the region, carrying off game and property and leaving no trace. Angus had been watching this band of desperadoes for some time, he said, and knew there were at least twenty of them who would stop at nothing.