FROM CAIRO TO THE ATBARA 49 realised more forcibly than hitherto the meaning of some of the “ Plagues of Egypt.” Nile boils are only too well known amongst the hapless officials who dwell along the banks of the river. Again, as the ancient narrative speaks of the dust as the vehicle of malignant forms of insect life, so now bacilli are spread broadcast by this means. When we woke up in the morning and shook an inch of dust from our blankets, we were lucky not to find in addition that our mouths and throats were ulcerated; and men suffering from enteric fever and other internal inflammations found their recovery retarded, and often, I am afraid, prevented, by the penetrating dust which they were compelled to swallow and breathe, however fast tents were tied up or windows fastened.

Another abomination was the plague of flies. At meals one made a sweep to get rid of these beasties and then a rush to convey the food to one’s lips; but even in this brief space a couple of flies often found time to get their beaks into the morsel and so perished miserably.

Tobacco was useless against: these Sudanese flies; they seemed to enjoy the fumes. The 4