"Oh, nothing," answered Butler hopelessly.

The Professor shook his head as if argument were a sheer waste of time.

It was quite late when the last of the boys turned in that night, for there was much to discuss, much to wonder at in the strange actions of the mountaineer who had ordered them from the Ridge.

During the talk Chunky went to sleep by the fire. He was awakened suddenly when Ned, who had gone to the spring for a cup of water, poured some of the almost ice-cold water into the fat boy's open shirt front at the neck. Chunky leaped up, uttering a howl, and bowling over the Professor who sat close beside him. For a few moments there was no end of excitement, which finally came to a finish when Stacy started off for his bunk in high dudgeon.

Tad sat regarding the fat boy with twinkling eyes. Tad had something in mind. Mischief was brewing when that look appeared in his eyes. Soon after that he turned in, followed immediately by the other members of the party.

As the hours drew on, the campfire died down to a glowing heap of embers and coals, now and then starting into a sputter and a crackle as some charred piece of wood blazed up and burned briskly for a minute or two. Inside a tent one boy lay with half closed eyes gazing thoughtfully at the fire. After a time he got up cautiously and peered out. Being satisfied that all were asleep, he stole into the adjoining tent with a rope in his hand. Soon afterwards he slipped out and entered another tent, after which he went back to his own tent.

Once more the camp settled down to silence. The fire burned lower and lower until the camp was almost in darkness.

Suddenly a figure all in white appeared at the entrance to the tent occupied by Stacy Brown.

"'Ware the black cat!" it said in a deep sepulchral voice. "'Ware, 'ware the—"

"Wha-wha-wha-wha-what!" gasped Stacy Brown, sitting up suddenly, gazing wide-eyed at the apparition at the tent entrance.