Frank turned to Barney.
The truth had burst upon him with horrible force.
“My God!” he gasped. “We are lost, Barney. They have discovered our escape!”
“Begorra, that’s thrue enough,” agreed the Celt. “Phwat shall we do, sor?”
For a moment Frank was in a quandary.
But there was no time to lose.
The Mexicans were swarming up into the galleries.
To retreat into the shaft from which they had emerged would be folly.
But where else could they go?
It was a serious question.