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William Nathaniel Hallett (c1890-1949)
1950 Obituary 
"WILLIAM NATHANIEL HALLETT was the chief engineer of Messrs. Cadbury Brothers, of Bournville, and had been associated with the firm for thirty-eight years. He received his technical training (which extended over a period of ten years, from 1904 to 1914) at the Birmingham Municipal Technical School and served a four years' apprenticeship with Messrs. Guest, Keen and Nettlefolds, Ltd., on the conclusion of which, in 1908, he found employment as a turner and toolmaker to the Birmingham Metal and Munitions Co.
After two years' experience as draughtsman to Messrs. Wright, Bindley and Gell, Ltd., of Birmingham, he joined Messrs. Cadbury Brothers in 1911 in a similar capacity and successively filled the positions of head draughtsman, assistant engineer, and chief assistant engineer.
Finally, in 1937, he was appointed chief engineer, in which capacity he was responsible for all engineering work in connection with a group of factories with a personnel of some 10,000. He was appointed a managing director in 1943, and in the following year became vice-chairman of Messrs. W. Sisson and Company, Ltd., of Gloucester.
During the war of 1939-45 he was associated in the Midlands with the Ministry of Production and was also a member of the Local Reconstruction Panel of the Emergency Services Organization. Mr. Hallett, whose death occurred on 14th October 1949, at the age of fifty-nine, was elected a Member of the Institution in 1926."