Chapter

 1 VI    | Were we to reach a depth of thirty miles we should have arrived
 2 XII   | shall get on at the rate of thirty miles a day.”~“We may; but
 3 XIV   | village consisting of about thirty huts, built of lava, at
 4 XIV   |  series of vertical columns thirty feet high. These straight
 5 XXIV  |   our calculations, we were thirty leagues south-east of Rejkiavik,
 6 XXVI  |    brought us to a depth of thirty leagues; that is, that for
 7 XXVI  |     is, that for a space of thirty leagues there were over
 8 XXVII |   at an immeasurable depth! Thirty leagues of rock seemed to
 9 XXVII |     remains should be found thirty leagues below the surface
10 XXVIII|       What other men can be thirty leagues under ground?”~I
11 XXX   |   here were pale mushrooms, thirty to forty feet high, and
12 XXXI  |   suppose this sea to be?”~“Thirty or forty leagues; so that
13 XXXII |      he said, we shall make thirty leagues in twenty-four hours,
14 XXXII |     in a direct line. Coast thirty leagues to leeward. Nothing
15 XXXIII|     this underground sea at thirty leagues. Now we had made
16 XXXIII|   of one of these creatures thirty feet in length. Am I then
17 XXXIII| feet long, and a serpent of thirty, lifting its fearful head
18 XXXIII| flexible as a swan’s, rises thirty feet above the waves.~Those
19 XLI   | were running at the rate of thirty leagues an hour.~My uncle