A violent thunderstorm, with a deluge of rain, broke upon our camp on the banks of the Atbara, fortunately just after the tents were pitched. We thus had an example of the extraordinary effects of the heavy rain in tearing away the soil of the valley. Trifling watercourses were swollen to torrents. Banks of earth became loosened and fell in, and the rush of mud and water upon all sides swept forward into the river with a rapidity which threatened the destruction of the country, could such a tempest endure for a few days. In a couple of hours all was over.