G. F. Foley.
El Fasher,
June 30, 1923.
APPENDIX I
Note on the Cartographical Results of Hassanein Bey’s Journey
John Ball, O.B.E., D.Sc., Director of Desert Surveys, Egypt
1. Introduction
THE cartographical data brought back by Hassanein Bey consist of:
(1) Note-books containing the records of astronomical observations for the determination of time, latitude, and compass-variation at nineteen principal camps, with records of watch-comparisons.