THE letter from Sir Rutherford Alcock in yesterday's Times, announcing the death of Mr. Keith Johnston, will be received with surprise and sincere regret. As our readers know, Mr. Johnston was leading the Geographical Society's expedition from Dar-es-Salaam to the north end of Lake Nyassa, and, if possible, thence to Tanganyika. A start was made on May 14, and now the sad news comes that the young leader died of dysentery on June 28, at Berobero, about 130 miles inland. Mr. Johnston came of a famous geographical house, and had already done good exploring work in South America. He was enthusiastic on the matter of African exploration, and was well qualified to carry it out in a scientific method. His death is a real loss to scientific geography. We are glad to learn that the expedition will be continued under the leadership of Mr. Thomson, the geologist who accompanied Mr. Johnston.