It has been assumed in previous notes on the subject, that such a reservoir alongside the Fayûm would be capable of giving that province its summer supply, but there would be a difficulty in the way of doing this. Under present arrangements the water-level at the end of the Bahr Yûsuf at Medineh is maintained throughout the summer at R.L. 21·70. If the level were to be lowered, lands now commanded by the water would cease to be so. The Wadi Raiân reservoir, whose level has been assumed to fall to R.L. 21·00, while a length of canal of at least 40 kilometres would be required to convey the water to Medineh, could not, during part of the summer (after its water surface had fallen below R.L. 23·50) deliver water at the level at present maintained. It would, probably, therefore be necessary, in spite of the adjacent reservoir, to supply the Fayûm during summer by a branch from the Ibrahimîyah Canal, but the reservoir could assist by providing for the irrigation of all the lands, now cultivated or capable of being reclaimed, on the left of the main south drainage line, and the part of the province watered by the Qalamshah Canal; that is, it would feed the Gharaq, Qalamshah, and Nezlah Canals, and so far assist in the summer irrigation of the province. No doubt the proximity of a lake of 600 million square metres (280 square miles), filled to a high level with reference to the greater part of the Fayûm, would affect the climate of the province, and at any rate take some of the heat out of the south winds, which blow at intervals in March and April. INDEX. * * * * * Arsinoë, 25 Arsinoite Nome, 48, 82 Bahr Yûsuf, 9 _et seq._ Biahmu, ruins of, 76, 83; supposed quay at, 85 Birket-el-Qurûn, 6-9, 49, 96; area of, 7; evaporation, 9 Brugsch Pasha, 39, 93 Canal, the Ibrahimîyah, 10; ruins of two ancient canals, 99 Crocodilopolis, 25, 72 Crops in the Fayûm, 17 Diodorus, 21, 27 Fayûm, the, 5 _et seq._; area of the Lake Fayûm, 67; derivation of name, 24; fisheries in the, 18; geological history of, 61; situation of, 5 Hawârah, the pyramid of, 25 Hawârat-el-Maqta, 97, 102 Helouan, 72 Herodotus, 19 Labyrinth, the, 25, 81 Levels:—Lowest summer levels at Wâstah, 78; between Dimay and Schweinfurth’s Temple, 55 _Reduced Levels_:—Bahr Yûsuf, 12; Birket-el-Qurûn, 7; the Fayûm, 30; Gharaq Basin, 5; “Hêt Rozma,” 101; Lake Mœris (_max._ and _min._) 79, 88; Lahûn Bridge, 103; Medineh, 6, 65; of Nile deposit at Hawârah, 48, 65; Nile deposit at Lahûn, 48; at Wâstah in April, 66; rock sill at Hawârah, 48; ruins of Dimay, 51; Temple of Schweinfurth, 52; Wadi Raiân, 5, 42 Linant Pasha, theories of, 28 _et seq._; difficulties of his theory, 30; inaccuracies of his theory, 34 Medineh, the town of, 6, 92