In place of a ventilator or chimney a trap-door may be placed in the roof
and used as a secret entrance, access to inside being had by a ladder. A
description of an appropriate ladder follows (Figs. 169 and 170).
Fig. 159 shows a rude way to make a chandelier, and as long as your
candles burn brightly you may know that the air in your little hogan is
pure and fresh. When such a chandelier is used pieces of tin should be
nailed above the candles to prevent the heat from burning holes through
the roof.