"I'm trapped here. My foot is caught."
On through the gloomy tunnel Joe went.
At last the light revealed the form of his brother some distance ahead. Frank was lying flat on the rocky floor of the passage, with his foot caught in a crevice between two heavy boulders. He had tried to climb over them, and one rock had evidently become dislodged, pinning his foot against the other.
"Are you hurt?" asked Joe anxiously, as he reached Frank's side.
"No. I'm all right. But I can't move my foot."
Joe put down the flashlight so that its glare clearly illuminated the scene. Then he went over to the boulder and exerted all his strength to move it. But the boulder was heavy. Had it struck Frank's foot directly it would have shattered it to a pulp. Fortunately, it had merely slid into position above the other rock, pressing against the boy's ankle and imprisoning his foot in the crevice between.
Frank was unable to lend his brother any assistance. He was lying face downward and was unable to rise to a sitting position.
"It's—mighty—heavy!" panted Joe, as he strove to move the heavy boulder. It refused to budge.
"Rest a bit and then try it again."
Joe sat down, breathing heavily.