[436]My camp at Auderas was situated about 400 yards east of the camp site which the Foureau-Lamy Mission occupied and where, therefore, Foureau’s observation was probably made. This difference accounts for the discrepancy in our longitudes. The Cortier map shows an astronomically fixed point at Auderas which, when measured on the copy in my possession, gives these co-ordinates, but they are not recorded in the table on the second sheet of the map, as are the other positions in Air. Foureau’s latitude is based upon five observations, one of which is appreciably smaller than the other four; if this result is omitted from the average, the latitude becomes even higher than it is given in the table.
[437]Foureau’s latitude for Iferuan is based upon five observations, one of which is appreciably higher than the other four; if this result is omitted the average practically coincides with my observation, which was taken on the identical spot.
[438]The altitudes obtained by me from boiling-point observations and aneroid readings are not given; they are numerous but have not been fully worked out.
APPENDIX II
THE TRIBAL ORGANISATION OF THE TUAREG OF AIR
[Division I.] The People of the King.
[Division II.] The Itesan and Kel Geres.
[Division III.] The Kel Owi.
[Division IV.] The Tuareg of Damergu.