CHAPTER III
Empty Tool Boxes
When he was knocked off his feet by the impact of falling débris, Frank Hardy crouched down, protecting his head as well as possible, until the downfall was over. Although a great deal of rubbish descended, it was not heavy material and when at last the rain of plaster and splintered lathes had ceased Frank knew that he was uninjured, although he was almost buried in the heap and half smothered by the thick dust that rose all about him.
He managed to get to his feet, fighting his way clear of the rubbish, and the first sight that met his eyes was an arm, sticking out of the débris near by. He seized the outstretched hand and dragged the owner to safety, discovering that it was his brother Joe.
By this time the others were beginning to extricate themselves, and within a few minutes all five boys, covered with dust from head to foot, had scrambled out to the clear floor in the middle of the hall. No one was injured,
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