Suddenly Bob uttered an exclamation.
“Are you hurt?” cried Ned.
“Something cut my wrist!”
“What is it?”
“A piece of glass, I think.”
“Glass! Good!” came from Jerry. “Can you get it in your hands?”
“I have it.”
“Roll over towards me, and bring it with you.”
Bob did so. He came close to where Jerry was still tugging away at the ropes.
“How did you find it, Bob?”