Book,  Chapter

 1        I,  V   |      long over any insoluble problem. “Come what may,” he presently
 2        I,  VI  |    should be delivered was a problem he had yet to solve.~During
 3        I,  VII |      To the solution of this problem Servadac applied himself
 4        I,  X   |   the same time, we have the problem still unsolved that the
 5        I,  XV  |     of the catastrophe was a problem still to be solved.~“Ah!
 6       II,  II  |      any real light upon the problem that they were all eager
 7       II,  IV  |   its surface.”~“A laborious problem,” remarked Count Timascheff.~“
 8       II,  IV  |  replied the professor; “the problem is independent of it.”~“
 9       II,  VII |    key which will unlock the problem of the whole weight of Gallia.
10       II,  XVII| themselves the all-important problem was—what effect would the