"It's all right. I just slipped." Frank got to his feet. "I lost the light. It fell down here somewhere. Hang onto the back of my coat and I'll go ahead and get it."
Joe caught at the back of his coat and Frank slowly felt his way forward in the deep blackness.
Suddenly he lurched ahead, his feet sinking in a treacherous mass of sand and gravel. Wildly, he strove to retain his footing, but the effort was in vain. He felt himself slipping and, as he uttered an instinctive cry of warning to Joe, he was flung into space.
Joe, who had been clinging to Frank's coat, was wrenched to one side. He stepped forward, grasping for his brother, then he, too, went hurtling into the darkness.
They pitched down amid a clattering of rocks and pebbles. Then, with an icy shock, they plunged into a deep pool of water!
