He yelled and drew back his hand

"What now?"

"I've cut myself."

"Why, how on earth did you manage that?"

"There's a knife sticking out of the sack. Let's open it and get it out."

"What for?"

"It's a pity to throw such a thing into the sea."

The boys shivered.

This time there could be no mistaking the words.

"Jack," whispered Harry Girdwood, "do you hear?"