er from his mind.

They rather expected to see the thing in white again that night, but it
did not appear, and morning came without anything having disturbed their
heavy sleep, for they were tired from the day's tramp.

It took them the greater part of the day to make a circuit of the base
of Phantom Mountain in order to get to a place where a sort of trail led
upward.

"It's too late to do anything to-night," decided Tom, as they set up the
tent. "We'll rest, and start the first thing in the morning."

"And the ghost isn't likely to find us here," added Mr. Damon. "Where
are you going, Mr. Parker?" he asked, as he saw the scientist tramping a
little way up the side of the mountain.

"I am going to make some observations," was the answer, and no one paid
any more attention to him for some time. Supper was nearly ready when
Mr. Parker returned. His face wore a rather serious air, and Mr. Damon,
noting it, asked laughingly:

"Well, did you discover any volcanoes, that may erupt during the night,
and scare us to death?"

"No," replied Mr. Parker, calmly, "but there is every indication that we
will soon have a terrific electrical storm. From a high peak I caught a
glimpse of one working this way across the mountains."

"Then we'd better fasten the tent well down," called Tom. "We don't want
it to blow away."

"There will not be much danger from wind," was Mr. Parker's opinion.

"From what then?" asked Mr. Jenks.

"From the discharges of lightning among these mountain peaks, which
contain so much iron ore. We will be in grave danger."

The fact that the scientist had not always made correct predictions was
not now considered by his hearers, and Tom and the two men gazed at Mr.
Parker in some alarm.

"Is there anything we can do to avoid it?" asked Mr. Jenks.

"The only thing to do would be to leave the mountain," was the answer,
"and, as the iron ore extends for miles, we can not get out of the
danger zone before the storm will reach us. It will be here in less than
half an hour."

"Then we'd better have supper," remarked Tom, practically, "and get
ready for it. Perhaps it may not be as bad as Mr. Parker fears."

"It will be bad enough," declared the gloomy scientist, and he seemed to
find pleasure in his announcement.

The meal was soon over, and Tom busied himself in looking to the guy
ropes of the tent, for he feared lest there might be wind with the
storm. That it was coming was evident, for now low