Lieutenant Yusuf was presently despatched with three soldiers, three quarrymen, Jází, the Arab guide of a former visit, and eight camels, to bring back specimens of the copper silicate to the south of ‘Aynánah, and to make a regular survey of the northern solfatara. He set out early on February 18th, and after twenty-one hours of caravan-marching reached the Jebel el-Fara'. Here the outcrop is bounded north by the Wady el-Fara', and south by the Wadys el-Maríkhah and Umm Nírán, the latter forming the general recipient of these Nullahs. The Jebel is about 120 feet high, of oval form, stretching 1750 metres from north-north-west to south-south-east. The rich silicate (not carbonate) of copper, which disdains a streak and affects the file, is found, as usual with this ore, only in one part of the valley to the south-west, some thirty-five feet above the sole: it is a pocket, a "circumscribed deposit," as opposed to a "true vein" or a "vein-fissure." The adjoining rocks contain carbonates of iron and copper, and the ore-mass is apparently carbonate of lime. This second visit generally confirmed the report of Ahmed Kaptán, except that there were no signs of working, as he had supposed. The travellers passed the whole of February 20th at the diggings, made a plan, and sent back two camel-loads (four sacks) of the gangue, in charge of a soldier, to the Fort of El-Muwaylah. On the next day the little party made for the Wady ‘Aynúnah, and, striking to the left of the straight line, crossed the maritime country, here a mass of Wadys, including our old friend the ‘Afál. This highway to the northern Hismá falls, I have said, into the Mínat el-‘Ayánát, a portlet useful to Sambúks: its sickle-shaped natural breakwater, curving from west to south, resembles that of Sinaitic Marsá el-Ginái, and those which are so common in Western Iceland. On February 22nd, a very devious path, narrow and rocky, lasting for one hour, led them, about noon, to the northern Jebel el-Kibrít. The distance from El-Muwaylah is about sixty-six miles; and the country west of a line drawn from ‘Aynúnah to Makná was, before this march, utterly unknown to us, consequently to all the civilized world.