Examining Mr. Dupuis’s figures and sections for the outlet of lake Tsana, I calculate that this reservoir would not supply a fraction of the water estimated by Mr. Dupuis. If I were wrong, and I should be pleased indeed to be wrong here, a tunnel along the alignment roughly surveyed by Mr. Dupuis, Plate XX, leading the waters of Lake Tsana into the Rahad river, and from there under the Blue Nile by a syphon, and branch canals irrigating both banks of the Rahad and both banks of the Blue Nile to Khartoum, would be one of the boldest projects in the world. It will be noted that no mention has been made of the tracts between the foothills of Abyssinia and Wad-el-Medani which can produce good crops of Indian corn, millets and even cotton in nine years out of ten with the aid of rain without irrigation. If the land could lend itself to basins similar to those of Bundelkund or to river fed pans as in Madras, a development of this country would be possible. Ordinary Egyptian basin irrigation would be, I think, of no use. The following quotations from a letter written by Messrs. Choremi, Benachi and Co., of Alexandria, to Mr. Foaden on the 8th February 1904, will give an idea of the estimation in which Sudan grown cotton is held in Alexandria:-- “The cotton generally is good and superior to any Sudan cotton I have yet seen. Last year the best I saw was sent by the Sudan Government and grown in Miralai Stanton Bey’s garden, with artificial irrigation and quality was (first picking) class “good”, equal to Beni-Suef or Minieh cotton, but more woolly. In any case it is saleable cotton for coarse Nos. of Yarn, not what we call Bolton Spinners’ cotton. “I now give you the following classification and values compared to Standard of Full Good Fair Lower Egypt which is the basis of “Futures” in our Market and Liverpool. “On Upper Egypt the outturn in ginning on basis 315 lbs. per cwt. in seed runs from 100 to 104, and Lower Egypt 105-110 according to province grown and quality of seed. No. 1 Outturn 96 Class “good”, value P.T. 5 over Delta fully good fair--colour rather light--good staple, better than Beni-Suef Ashmouni or even Afifi. No. 2 „ 98¹⁄₂ Long staple and finish does not look grown from afifi seed but from superior quality, value about P.T. 15 over F.G.F. No. 3 „ 99 Class “good”, the seed of this is from Delta because mixed--there is also some Abassi in and does not look as from afifi seed because finer than any afifi grown in Minieh and Beni-Suef, value 5 to 10 over F.G.F.