At last, about five o'clock P.M., Dr. Overweg appeared. He had experienced great thirst and fatigue; but, having the assistance of Amankee, he got back safe. He at once confessed his fears for Dr. Barth. I began to think this gentleman must either have gone to Ghât, or that some accident had befallen him. Soon, indeed, we began to have gloomy apprehensions, and to talk seriously of a search. The Tuaricks were not very civil, and Hateetah threw all the responsibility of the safety of my fellow-travellers on me. Dr. Overweg and several people went out in search of Dr. Barth just before sunset. Night closed in; no appearance of our friend. I hoisted a lamp on the top of the ethel, and made large fires as the sun went down, in hopes that their glare might be seen at a distance from the Kasar. Our servants returned without Dr. Overweg. He had promised to be back by sunset, and I began to fear some accident had befallen him likewise. The evening grew late, and Hateetah came to me, in a very nervous state, to inquire after the Germans. I endeavoured to compose him by telling him the responsibility was on us, and not on him. Dr. Overweg returned at midnight. He had thrown into the desert various pieces of paper, on which was written the direction of our encampment from the Kasar. We were very uneasy, and slept little, as may be imagined; but before we retired for the night Hateetah arranged a general search for the morning. Next morning, accordingly, at daybreak (16th), the search was commenced, by two camels scouring the environs of the desert. Dr. Overweg went with one of the parties, but returned at noon, bringing no news of Dr. Barth. Amankee with his party had, however, seen his footsteps towards the north. This was most important, as it directed our attention that way, and we thought no more of his having gone to Ghât. We now calculated that our companion had been twenty-four hours without a drop of water, a gale of hot wind blowing all the time! Dr. Overweg proposed to me that we should offer a considerable reward, as the last effort. He mentioned twenty, but I increased the sum to fifty dollars. This set them all to work, and a Tuarick with a maharee volunteered to search. I found it necessary, however, to give him two dollars for going, besides the proffered reward; he left at two P.M., and all the people were sent off by Hateetah a couple of hours after him.