Book,  chapter

1    1,   12|  through Chili; but all the obstacles and difficulties incident
2    2,    3|     natives, are impassable obstacles. Twenty miles of desert
3    2,   15| owing to the insurmountable obstacles, huge blocks of granite,
4    2,   16|    difficulties are not the obstacles in the road, but the Snowy
5    3,    8|  little party overcame many obstacles in crossing the plains in
6    3,   15|  owing to the circuits, the obstacles, and the imperfect observations,