Part,  Chapter

1      I,  IV  |          but who could tell what insurmountable difficulties nature might
2      I,  XIII|          The difficulty appeared insurmountable, when the invincible Lieutenant
3     II,  X   |           but now the sea was an insurmountable barrier, and they, too,
4     II,  XIII|       expect to meet with almost insurmountable difficulties on the way;
5     II,  XIII|    considerable reason, would be insurmountable.~After getting over one
6     II,  XV  | solitudes, or struggling against insurmountable difficulties to reach the