Jean assisted both of the girls to mount and then the string of horses started toward the mountain trail, for Bob was eager to visit the old deserted Crazy Creek mine. Jean Sawyer glanced often at the pale, beautiful face of the girl who seemed purposely to avoid him. CHAPTER XXXI. AN UNCANNY EXPERIENCE At the foot of the trail that led up the mountain, Dan, who had been in the lead with Meg, called: "Jean, we're waiting for you to go ahead, since you have so often ridden this trail." The boy, who had been silently riding at Jane's side whenever it had been possible, turned to ask: "Will you ride on ahead with me?" The girl tried to smile at him, but her lips quivered. "No, thank you, Jean. I think I will stay with Merry." A boyish voice called, "Ask me and hear what I'll say." It was Bob, and before Jean could express a desire for his companionship, the black horse which the younger lad rode was scrambling up the rocky trail following the leader. Julie and Gerald, on their agile ponies, were next; Meg and Dan followed, while Jane and Merry rode more slowly, each putting her entire trust in the horse on which she was mounted. "We do not need to try to guide them," Merry had said. "Jean told me that the horses climb best without direction. Just pull up on the rein if it should happen to stumble." Bob's enthusiasm over all he saw was given such constant expression that Jane's silence was not so noticeable. Dan, now and then, glanced back anxiously. He also had noted Jean's apparent devotion to Merry on the two days previous, and he wondered if it had saddened Jane, and yet she had never said that she really cared for Jean. When they reached a wide rock plateau their guide whirled in his saddle to ask if any of the riders were tired and wished to rest for a while, but they all preferred to keep on. A few moments later they were passing through the deserted mining camp. There was not a breath of wind stirring and the only sounds they heard were the humming of insects and now and then a bird song. The cabins, many of them falling into ruins, looked as though they might be haunted with ghosts of the men who had given their lives trying to find gold. "Say, boy!" Bob drew rein to look about him. "This places gives one the shivers, all right! At any minute I expect to hear a ghost groan or----" "Hark! What was that?" Merry interrupted. "I _did_ hear a groan! I am positive that I did." They all listened and there was no mistaking the fact that a groaning noise was coming from a cabin that stood near a deep pit beside which was a pile of red and yellow ore. "What do you suppose it is, since we know there is no such thing as a ghost?" Dan turned toward Meg to inquire. Surely the mountain girl would know.