A great cloud of dust was raised which nearly overwhelmed the two explorers.
They emerged from it completely covered and wheezing and puffing.
“Jupiter!” gasped Tony, “there’s no question about getting out of here now, Frank.”
“No, not if this dust don’t kill us,” replied Frank.
“Whew! it is fearful.”
After a time, however, the dust cloud was dispelled and they emerged all safe.
Then the first impulse was to break through the archway.
This they did and came to a flight of stairs.
Up these they ran at full speed.
Arrived at the top, they were confronted by an astounding fact.