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Hermann Dickenson Marshall (1872-1936), of Marshall, Sons and Co
1872 Born in Gainsborough, son of Henry Dickenson Marshall
1889 Apprenticed at Marshall, Sons and Co
1894 In charge of testing and experimental department; also supervised the erection of steam plant for electricity generation and other purposes
1901 Mechanical engineer; manager of a department
1901 Joined I Mech E
1911 Mechanical engineer, living in Gainsborough, 38, with Lucy Ann Marshall 39, Norman Dickenson Marshall 6, Mary Ada Marshall 3, Henry Dickenson Marshall 1
1937 Obituary 
Major HERMAN DICKENSON MARSHALL, T.D., was for many years chairman and managing director of Messrs. Marshall, Sons and Company, Ltd., of Gainsborough. He was the son of Mr. Henry D. Marshall, M.I.Mech.E., and was educated at Gainsborough Grammar School and Uppingham. In 1888 he entered his father's works and served a five year's apprenticeship in the shops and drawing office. He was placed in sole charge of the testing and experimental departments of the works in 1894. In addition he supervised the installation of a number of steam power plants for municipal electricity undertakings, and he took charge of the official trials carried out at Stafford Electric Light Station by Dr. J. Hopkinson, M.I.Mech.E. Major Marshall was later appointed a director of the company and subsequently became joint managing director with his cousin, Mr. Herbert J. Marshall. On the death of the latter he was appointed chairman and managing director, retiring in 1935. He devoted much of his time to municipal affairs and to the Lincolnshire Regiment, and was formerly High Sheriff and Deputy Lieutenant of the county. His death occurred at Gainsborough on 6th July 1936 in his sixty-fourth year.
He had been a Member of the Institution since 1901.