Chapter

 1 IV    |           had had the audacity to penetrate! . . .~“Ah!” I cried, springing
 2 VI    | practicability of such a journey. Penetrate to the centre of the earth!
 3 VI    |       asking if it is possible to penetrate through such a medium.”~“
 4 VII   |       earnest in his intention to penetrate to the centre of this massive
 5 XIV   |         all. If there is a way to penetrate into the very bowels of
 6 XIX   |           to fear. Travellers who penetrate into the wilds of central
 7 XXVIII|        weakened voice could never penetrate to my companions.~“It is
 8 XXX   |         thousands. No light could penetrate between their huge cones,
 9 XXX   |     African city.~Yet I wanted to penetrate farther underneath, though
10 XXXI  |       will try, Axel, for we must penetrate all secrets of these newly
11 XXXV  |       electric light can scarcely penetrate through the dense curtain
12 XXXIX |           Liedenbrock ventured to penetrate under this colossal grove.
13 XLIII |        Soon lurid lights began to penetrate the vertical gallery which