had cleared. Tom tested it by dropping a match
down, and, to his delight it burned with a clear flame.

"It's all right!" he exclaimed. "The air is pure. Now to see where
we will bring up. Come on, everybody."

"Jest one minute, Massa Tom," begged Eradicate, as the young
inventor was about to descend the steps, which even the brightness
of his lamp did not disclose the end. "Is yo' gwine down dar, Massa
Tom?"

"Certainly, Rad."

"An' is yo'--'scuse me--but is yo' expectin' me fo' t' follow yo'?"

"Certainly, Rad."

"Den, all I's got t' say is dat yo' is 'spectin' too much. I ain't
gwine t' bury mahse'f alive not yit."

"But, Rad, this is where the gold images are. If you don't come down
with us you won't get any gold."

"Am dat so? No gold?" The colored man scratched his head. "Well, I
shore does want gold," he murmured. "I reckon I'd better trot along.
But one thing mo', Massa Tom."

"What is it, Rad?"

"Was yo' all aimin' t' stay down thar any length ob time? 'Case if
yo' is yo' all'd better take along a snack ob suffin' t' eat. 'Case
when I gits among gold I don't want t' come out very soon, an' we
might stay dar all day."

"Good advice, Rad," exclaimed Ned with a laugh. "I think we may get
hungry. You go back and put us up a lunch. We'll wait for you."

"Bless my napkin ring! I think you're right!" exclaimed Mr. Damon,
and Eradicate hurried back to the balloon to get some of the
condensed food.

He was soon back and then, with Tom in the lead, and with everyone
carrying an electric torch, with a spare one in reserve, and with
their weapons in readiness the party descended the stone steps.

Their footfalls echoed solemnly as they went down--down into the
unknown blackness. They kept their bright lights playing here and
there, but even these did not dispell the gloom. On every side was
stone--stone walls--stone steps. It was like going down into some
vast stretch of catacombs.

"Say, will we ever get to the bottom?" asked Ned, when they had
counted several hundred steps. "Maybe this goes down to the middle
of the earth."

"Well, ef it do I'm gwine right along!" called Eradicate. "I's gwine
t' hab one ob dem gold images or bust!"

"And I'm with you!" cried Tom. "We'll have to get to the bottom
sooner or later."

Hardly had he spoken than he came to the last step, and saw
stretching off before him a long tunnel, straight and level, lined
on both sides, and bottom, with smooth stones that gleam