After a time they came to the head waters of the creek in which Will and Sandy had fished, and saw Cameron standing on the other side.
"He's going into the mountains!" whispered Sandy.
"That's exactly where he's keeping Bert," George agreed.
In a short time Cameron paused in his walk and uttered a low whistle.
"What do you think of that?" asked Sandy. "He's going to meet some one here. And that means," the boy went on, "that he's had a pal watching Bert while he's been away."
"And it also means," George added, "that we can't be very far from the spot where Bert is concealed. I hope so, anyway, for I'm about tired enough to crawl into my little nest in the cabin."
"I should think you'd talk about sleep!" scoffed Sandy. "You slept all the afternoon!"
"If you mention that long sleep of mine again," George said half-angrily, "I'll tip you over into the creek. I'm sore over that myself!"
While the boys stood waiting end listening an answering whistle came from the side of a mountain not far from the rivulet.
"There's his chum!" whispered Sandy. "If we get up nearer, we may be able to hear what they say."