SIR WILLIAM HENRY PREECE, K.C.B., F.R.S., Past-President Ins. C.E., and formerly Engineer-in-Chief of the Post Office, died at Penrhos, Carnarvon, on the 6th November, 1913, in his eightieth year. Born at Bryn Helen, Carnarvon, on the 15th February, 1834, he WAS educated at King’s College, London, and gained practical experience in the offices of the late Edwin and Latimer Clark, then engineers to the Electric Telegraph Company. In 1853 Preece joined the staff of that company, which subsequently became by amalgamation the Electrical and International Telegraph Company, and after rapid promotion was appointed Superintendent of the Southern Division. From 1858 to 1862 he was nlso Engineer to the Channel Islands Telegraph Company, and in 1860 he became Superintendent of Telegraphs on the London and South Western Railway, where he introduced the Preece block system of working single lines and a system of electric communication between passengers and guard. When in 1870 the business of the various telegraph companies (about thirty in number) was transferred to the State, the subject of this memoir was appointed Engineer for the Southern Division of the State system with headquarters at Southampton.