“Don’t trouble it,” said Frank. “It may let us down into another underground lake.”
“Do you believe it?”
“I should fear it.”
But Tony could not resist the temptation to insert his fingers in the ring and give the stone a lift. It was a reckless thing to do.
The result was startling.
The stone yielded, and the next moment Buckden lifted it from its bed, disclosing a cavity beneath some four feet long by two wide.
Stone steps were revealed leading downward. For a moment the two explorers looked at each other.
“What will we do?” asked Buckden.
“Investigate,” said Frank, tersely.
“But it is dark down there.”