New Ideas for American Boys; The Jack of All Trades
CHAPTER VIII.
HOW TO BUILD AN UNDERGROUND CLUB-HOUSE 89
A Doorway at the Top, 89; The Trap-door, 90; Dimensions of House, 90; New Lumber, 92; Framing, 92; Passageway, 93; Windows, 94; The Roof, 94; A Ventilator, 95; Dangerous Caves, 96.