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1911 Living at Gloed Hame, Garth Road, Letchworth, Herts: Howard Devenish Pearsall (age 65 born Andover), Civil Engineer - Director of First Garden City. With his wife Ellen Beatrice Pearsall (age 52 born Wolverhampton) and their son Ralph Howard Pearsall (age 28 born Colorado, USA. (British subject)), Mechanical Engineer. Also two visitors. Two servants.
1946 Obituary 
RALPH HOWARD PEARSALL, M.A., whose death occurred on 24th October 1944, was elected an Associate Member of the Institution in 1908, and was transferred to Membership in 1920.
He was born in 1883, and was educated at University College School, London, and at King's College, Cambridge, where he graduated with honours in the Mechanical Sciences Tripos in 1905. He served his apprenticeship with the Premier Gas Engine Company, of Nottingham, and gained further experience in the shops of Messrs. Clayton and Shuttleworth, Ltd., Lincoln.
From 1906 to 1914 he filled a variety of posts as draughtsman, designer, and contract estimator. In addition, he acted as sales engineer to Messrs. Mather and Platt, Ltd., in London, and for the last two years of this period he was managing director of Messrs. Pearsall-Warne, Ltd., makers of the "Warne" light car, for the design and production of which he was responsible.
During the war of 1914-18 he saw service with a field company of the Royal Engineers, and rose to the rank of captain and adjutant. On his return to civil employment in 1919 he joined the Birmingham Small Arms Company, Ltd., for whom he was in charge of experimental works and design. He worked in close association with Dr. F. W. Lanchester in Lanchester Laboratories, Ltd., from 1929-38.
In 1938 Mr. Pearsall was attached to the Ministry of Transport and held the appointment of certifying officer for the West Midland Area until his death.