"Oh, no it isn't," declared Tom Swift, quickly. "We were just as ready to follow you into that cave as you were to go. No one could tell that the men would return so soon. It's nobody's fault. It's just our bad luck."
From where he lay, tied hand and foot, the young inventor could look out into the cave where he and the others had been caught. The diamond makers were busily engaged, apparently in getting ready to manufacture another batch of the precious stones. They paid little attention to their captives, save to warn them, when they had first been taken into the little cave, that it was useless to try to escape.
"They needn't have told us that," observed Tom, as he and the others were talking over their situation in low voices. "I don't believe any one could loosen these ropes."
"They certainly are pretty tight," agreed Mr. Damon. "I've been tugging and straining at mine for the last half hour, and all I've succeeded in doing is to make the cords cut into my flesh."
"Better give it up," advised Mr. Jenks. "We'll just have to wait."
"For what?" the scientist wanted to know.
"To see what they'll do with us. They can't keep us here forever. They'll have to let us go
