ACKNOWLEDGMENT
I AM deeply indebted to Dr. John Ball, O.B.E., Director of Desert Surveys of Egypt, who has been good enough to summarize the scientific results of my expedition in the First Appendix to this volume. His advice and the instruction which he gave me in the use of scientific instruments were invaluable. I was indeed fortunate in being able to draw upon his great knowledge.
The maps of my journey, one of which accompanies this volume, were kindly prepared by Dr. Ball and Mr. Browne and other members of the Survey Department of Egypt.
Dr. Hume and Mr. Moon of the Geological Survey of Egypt classified the geological specimens which I brought back and prepared a report which is contained in the Second Appendix to this book. By this willing assistance they added much to the results of my expedition.
Lewa Spinks Pasha, D.S.O., and Meshalani Bey of the Ordnance Department of the Egyptian War Office were responsible for the cases and containers and other camp equipment which I used. These proved to be satisfactory in every way, and I am grateful for the care and thought which were expended in their preparation.
My old friends Sayed El Sherif El Idrissi and his son Sayed Marghanny El Idrissi again gave me that good counsel and ready help which I had received from them in the course of my trip to Kufra in 1921.
Throughout my expedition I received the most friendly and effective assistance from Colonel Commandant Hunter Pasha, C.B., D.S.O., late Administrator of the Frontier Districts Administration; Colonel M. Macdonnell, late Governor of the Western Desert; Major de Halpert of the F.D.A.; Captain Hutton, O.C., Sollum; Captain Harrison, O.C. Armored Cars at Sollum; Abdel Aziz Fahmy Effendi and A. Kmel Effendi, Mamurs of Sollum and Siwa; Lieutenant Lawler, O.C., Siwa.
When I reached the Sudan my way was made easy and pleasant by the kindness of his Excellency Ferik Sir Lee Stack Pasha, G.B.E., C.M.G., Sirdar and Governor-General of the Sudan, and I cannot let this opportunity pass of expressing my cordial thanks to all the officials of the Sudan Government along my route, and especially to Lewa Midwinter Pasha, C.B., C.M.G., C.B.E., D.S.O., Acting Governor-General of the Sudan; Lewa Huddleston Pasha, C.M.G., D.S.O., M.C., Acting Sirdar; Kaimakam M. Hafiz Bey, O.C. Troops at Khartum; H. A. MacMichael, D.S.O., Assistant Civil Secretary; Captain J. E. Philips, M.C. Samuel Atiyah Bey, M.V.O., and Ahmed El Sayed Pifai of the Sudan Civil Service; Charles Dupuis, Acting Governor of Darfur; Sagh A. Hilym, S.O., El Fasher; J. D. Craig, O.B.E., Governor of Kordofan; Bimbashi A. Khalil, S.O., El Obeid; and the officers, officials, and notables of El Fasher and El Obeid.
To Bimbashi G. F. Foley, M.C., O.C. Artillery at El Fasher, I am grateful for the verse which adorns the last chapter of the book.
I am particularly indebted to Harold Howland and to W. H. L. Watson, an old Balliol friend, for their invaluable help and advice in the preparation of this book.
A. M. Hassanein.