Mr. Whitehouse, in his latest expression of views, supposes the Fayûm and the Wadi Raiân were filled to R.L. 30·00. I have given reasons for concluding there was never any Nile water in the Wadi Raiân. The evidence furnished also by Nile deposit and fresh-water shells on the Fayûm side of the entrance at Lahûn shows that the level of 30 was never reached. The highest Nile deposit near and on the Fayûm side of Lahûn is at about R.L. 26·00. The highest in the Fayûm near the Hawârah pyramid, which is on the edge of the Fayûm basin, is at R.L. 24·50 or thereabouts. The highest level of the lake was probably never more than one metre above this level, and it is therefore almost certain that the water-level was never sufficiently high to flow into the Wadi Raiân; and _if_ it ever did, it must have been but rarely, when extraordinarily high and prolonged Niles occurred; so that it must be concluded, if my views are correct, that the normal condition of the Wadi Raiân was then, as now, that of a dry waterless depression in the desert, and it cannot therefore be considered as having been Lake Mœris, or a part of it even, _at any time_. LINANT’S OBJECTIONS TO THEORY FAVOURED. _Author’s Views of Lake Mœris generally stated._—I myself agree with those who are of opinion that the Fayûm Province, or depression, (including the Gharaq Basin and the neck from Lahûn to Hawârah), was by itself Lake Mœris, and that within its limits and along its borders was to be found the inhabited and cultivated region known as the Arsinoïte Nome, which possibly also extended into the Nile Valley along the course of the canal connecting the Nile with the lake. The Fayûm then in its submerged state was, I believe, the Lake Mœris of Herodotus, Strabo, Diodorus, and Pliny, the modern Lake Qurûn being the persistent rudiment of this lake, and all that now remains of its formerly extensive sheet of water. (See Plate XX.) _Objections urged by Linant against these views._—This is no new theory. It is found _passim_ before Linant Pasha in 1842 took great pains to point out its absurdity, but it was his own assumptions regarding the maximum height which the water surface of Lake Qurûn could have reached, that created the absurdity. Assuming without evidence that the villages on the second plateau were all in existence at the time of Lake Mœris, he limits the level of Lake Qurûn to the edge of the second plateau, which is the same thing as laying down that its water surface never rose above R.L. + 10·00. Having come to this conclusion, he might have spared himself all his arguments against the theory, other than that which pointed out that a reservoir in the Fayûm at this level could have been of no utility in supplementing the low waters of the Nile.