Book,  chapter

1    1,   11|       sort only came in sight occasionally, and there were no birds
2    1,   26| beginning to graze the ground occasionally, and by sounding the depth
3    1,   26|     not refuse to give a lift occasionally to a tired pedestrian, or
4    2,   13|      an imperceptible murmur. Occasionally a swarm of par-roquets flew
5    2,   15|    vapors filled the air, and occasionally bright flashes of lightning,
6    3,   19|    long reveries, interrupted occasionally by a question or remark