Part,  Chapter

 1      I,  II   |       Pacific Ocean extremely difficult, unless the North-west passage
 2      I,  V    |    fear. A sledge is not more difficult to guide than a pony-carriage,
 3      I,  VII  |      really exist, it is very difficult to get at, and no one can
 4      I,  VII  |   snow-drift; but this was no difficult matter to men accustomed
 5      I,  VIII |   expert hunters find it very difficult to discover their retreats.”~“
 6      I,  VIII |    and Cape Bathurst was very difficult to cross, being hilly and
 7      I,  X    |    others have attempted this difficult task; but it was reserved
 8      I,  XI   |       only a few Polar hares, difficult of approach, poorly represented
 9      I,  XIV  |    One of these, a bulb, very difficult to classify, because its
10      I,  XV   |     either of which I find it difficult to believe; such men as
11      I,  XVI  |  weasels and martens are very difficult to catch; they wriggle their
12      I,  XVI  |         that you will find it difficult to show the grants entitling
13      I,  XX   | exposure out of doors. It was difficult enough to endure the inside
14      I,  XXI  |     ice that it would be very difficult to open it, or the bears
15     II,  V    |     construction of a boat, a difficult task, likely to occupy them
16     II,  X    |   share the compliments it is difficult to imagine, unless it was
17     II,  X    |       journey would have been difficult enough, even if the ice
18     II,  XV   |    through the winding valley difficult.~The party breakfasted and
19     II,  XV   |   only have made its way by a difficult and dangerous passage, is
20     II,  XV   |       north, it would be very difficult to reach the continent in
21     II,  XVIII|   appeared at it which it was difficult to recognise in the darkness.~
22     II,  XIX  |  situation, for breathing was difficult in the vitiated air deficient