[13]The natron is found at Arrighi, about ten hours’ journey north of Bilma.
[14]Usually each camel carries away four cones; the maximum load is six cones.
[15]I have, so far, failed to elucidate their origin to my entire satisfaction.
[16]Raid described in Out of the World North of Nigeria.
[17]There are times when fuel is one of the most important items that a caravan must carry.
[18]Some time later there was a raid some distance away, and my Tuaregs swore that our brief visitors were concerned in it; but by that time we were too far off for me to make sure that there was a definite reason for connecting the two occurrences.
[19]For scientific names of all species see Appendix I. M. signifies migrant. B. signifies new subspecies.
[20]For scientific names of all species see Appendix II. (A) signifies New Species. (B) signifies New Subspecies.
[21]This death is referred to in Chapter III.