Note 436 — APPENDIX I

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.