After this scene of affected cheerfulness, Bruce retired to his tent, where he was again haunted by the reflections which he had in vain endeavoured to shake off. He says, "Relaxed, not refreshed, by unquiet and imperfect sleep, I started from my bed in the utmost agony. I went to the door of my tent; everything was still; the Nile, at whose head I stood, was not capable either to promote or to interrupt my slumbers; but the coolness and serenity of the night braced my nerves, and chased away those phantoms that, while in bed, had oppressed and tormented me." Bruce remained at Geesh four days, during which time he was constantly occupied in making various surveys and astronomical observations. "The hillock of green sod" is in the middle of a small marsh of about twelve feet in diameter, surrounded by a wall of sod, at the foot of which there is a narrow trench which collects the water. In the centre of this hillock there is a hole, filled with water, which has no ebullition or perceptible motion of any kind on its surface: this hole is about three feet in diameter and about six feet deep. At the distance of ten feet from the hillock there is a second small fountain, about eleven inches in diameter and eight feet deep; and at twenty feet there is another hole, some two feet broad and six feet deep. These holes or altars are surrounded by walls of sod, like the former. The water from all these unites; and the quantity, Bruce says, "would have filled a pipe of about two inches in diameter." The result of about forty observations places these fountains in north latitude 10° 59' 25", and 36° 55' 30" east longitude. The mercury in the barometer stood at twenty-two inches, which indicates an altitude above the level of the sea of more than two miles. The thermometer, on the 6th of November, in the morning, was 44°, at noon 96°, and at sunset 46°. Having now given the result of Bruce's observations, it is necessary to make a few general remarks upon the subject. There is, perhaps, no geographical problem which has occupied the attention of so many ages as the discovery of the sources of the Nile. Had this river flowed through a rich and populous country, the information sought after would, like its waters, have descended rapidly from its source to its mouth; but in the great sandy desert of Nubia the problem of its origin was absorbed; and, thus flowing in mysterious solitude and silence, it reached Egypt, leaving its history behind it. The curiosity, therefore, not only of the Egyptians, but of strangers of all countries, was constantly excited. The fruitless attempt of Cambyses to penetrate Ethiopia, the eager inquiries which Alexander is said to have made on his first arrival at the temple of Jupiter Ammon, and the expedition of Ptolemy Philadelphus, are the most ancient evidences of this curiosity.