Chapter

 1 I    |       rails along the galleries, subterranean tramways, frames to support
 2 III  | influence of heat and water, our subterranean forests will not be reproduced,
 3 IV   |       his family ten years, in a subterranean dwelling, hollowed out in
 4 IV   |        son Harry foraged for the subterranean housekeeping; as for himself,
 5 V    |      each other by means of long subterranean galleries. Thus there existed
 6 V    |        perforated with shafts, a subterranean labyrinth, which might be
 7 VII  |         through the labyrinth of subterranean galleries. Starr, Madge,
 8 VII  |           what might be called a subterranean county, which, to be habitable,
 9 VIII |        this immense cavern, this subterranean lake, whose waters bathe
10 X    |       laved by the waters of the subterranean sea.~When this underground
11 XIV  |        their minds to quit their subterranean home for a single day.~James
12 XVI  |       owing to the overflow of a subterranean sheet of water penetrating
13 XVIII|         threatened danger to the subterranean colony was made known to