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John Frederick Mayne (c1888-1947)
1949 Obituary 
"JOHN FREDERICK MAYNE received his technical education at the East London College and the Poplar School of Marine Engineering.
After serving his time in the locomotive works of the North London Railway, at Bow, from 1905 to 1909, he sailed in ships of Messrs. J. and C. Harrison, Ltd., and Andrew Weir, Ltd., for five years, as fourth and later third engineer. During this period he obtained his Board of Trade First-Class Engineer's Certificate. In 1914 he enlisted in the Royal Naval Air Service and served overseas. Two years later he transferred to the Royal Naval Reserve and was granted the rank of engr. sub lieutenant. Returning to civil life in 1919 he found employment as assistant engineer surveyor to Messrs. Dudgeon and Gray, consulting engineers, London, but in the following year he was appointed assistant engineering inspector in the Store Department of the High Commissioner for India, where he remained until 1930 when he became senior inspector in Scotland, with responsibility for the purchase and inspection of all engineering production in that area for the Government of India. This position he relinquished in 1939 on account of ill health. Mr. Mayne, whose death occurred on 14th November 1947, in his fifty-ninth year, was elected an Associate Member of the Institution in 1931."