“There may be two phantoms,” suggested Mr. Jenks.  “They may keep one on this side of the mountain, and one on the other, to warn intruders away.

“It’s possible,” admitted Tom.  “Well, we’ll see how things look in the morning, when we’ll take up our march again, and go up the mountain.  We’ll reach the top, if possible, which we couldn’t do from the other side, as it was too steep.”

“I hope we shall be able to go forward in the morning,” came from Mr. Jenks.

“What do you mean?” asked the lad, struck by a peculiar significance in the diamond man’s tones.

“Why, that landslide may have opened a great gully in the side of Phantom Mountain, which will prevent us from passing.  It was a terrific lot of earth and stones that slid away,” answered Mr. Jenks.

“It certainly was,” agreed Mr. Parker.  “I would not be surprised if the mountain was half destroyed, and it may be that the diamond cave no longer exists.”

“Not very cheerful, to say the least,” murmured Mr. Jenks to Tom, and, as it was getting quite chilly, following the storm, they went inside the tent.

Tom could hardly wait for daylight, to get up and see what havoc the landslide had wrought.  As soon as the first faint flush of dawn showed over the eastern peaks, he hurried from the tent.  Mr. Damon heard him arise, and followed.

A curious scene met their eyes.  All about were great rocks rent and torn by the awful power of the lightning.  The fronts of the stone cliffs were scarred and burned by the electrical fire, and fantastic markings, grotesque faces, and leering animals seemed to have been drawn by some gigantic artist who used a bolt from heaven for his brush.

But the eyes of Tom and Mr. Damon took all this in at a glance, and then their gaze went forward to where the avalanche had torn away a great part of the mountain.

“Whew!  I should say it was a landslide!” cried Tom.

“Bless my wishbone, yes!” agreed Mr. Damon.

Below them, in the valley, lay piled immense masses of earth and stones.  Boulders were heaped up on boulders, and rocks upon rocks, being tossed about in heaps, strung about in long ridges, and swirled about in curves, as though some cyclone had toyed with them after the lightning flash had tossed them there.

“But the mountain isn’t half gone,” said Tom, as his eyes took in what was left of the phantom berg.  “I guess it will take a few more bolts like that one, to put this hill out of business.”

Though the landslide had been a great one, the larger part of the mountain still stood.  An immense slice had been taken from one side, but the summit was untouched.

“And there’s where the diamond cave is!” cried Tom, pointing to it.

“I think so myself,” agreed Mr. Jenks, who came from the tent at that moment, and joined the lad and Mr. Damon.  “I think we shall find the cave somewhere up there.  We must start for it, as soon as we have eaten, and we may reach it by night.”