Book,  Chapter

 1        I,  I    |        in that form was all but unknown.~“I know well enough,” he
 2        I,  IV   |      blazing spheroid, hitherto unknown to astronomy, now appeared
 3        I,  V    |      had become the shore of an unknown sea.~Eager to throw some
 4        I,  IX   |      flow of the waters—a thing unknown in the Mediterranean, where
 5        I,  X    |        new orbit, and from some unknown cause has drawn nearer to
 6        I,  XI   |     remained, and a new soil of unknown formation had certainly
 7        I,  XV   |    progress was arrested by the unknown shore; as nearly as possible
 8        I,  XVI  |      with Mars, Venus, and that unknown orb which was moving in
 9        I,  XIX  |    origin and a substance alike unknown.~Of all these spots only
10        I,  XIX  |         being carried away into unknown regions of space, and that
11        I,  XXII |   catalogues, or one previously unknown, he did not presume to determine.
12        I,  XXIII|    cried the captain, “from our unknown friend. Let us hope that
13        I,  XXIV |     more than probable that the unknown writer had thence sent out
14        I,  XXIV |         within the power of the unknown writer to estimate with
15       II,  III  |     earth had been grazed by an unknown comet, which had caught
16       II,  III  |        of the comet was utterly unknown elsewhere; and the ignorance
17       II,  VII  |      soil is of a substance not unknown upon the earth.” And speaking
18       II,  X    | developed, and which, from some unknown cause, has become solidified.
19       II,  XII  |    Although the lava, from some unknown cause, had ceased to rise