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James George Mayne (1877-c1950) locomotive engineer.
1951 Obituary 
"JAMES GEORGE MAYNE, who was born in India in 1877, had considerable experience as a locomotive engineer in the course of his career, nearly all of which was spent in Cuba and South America.
He was educated at the Royal High School and at Heriot Watt College in Edinburgh and obtained his theoretical training in engineering at the Glasgow and West-of-Scotland Technical College. His apprenticeship was served with the Rose Street Foundry and Engineering Co, of Inverness, from 1894 to 1900, after which he became an improver to the Highland Railway and later found the same employment with Messrs. Andrew Barclay, Sons and Company, Ltd., Kilmarnock.
In 1902 he went to Chile to take up an appointment as assistant mechanical engineer to the Lantaro Nitrate Co at Taltal. This was followed by a succession of short engagements including those of assistant locomotive superintendent to the Cuban Central Railway and locomotive, carriage, and wagon superintendent to the Western Railway of Havana. A temporary appointment as vice-president and general works manager of the Havana Dry Dock Co was succeeded by that of locomotive, carriage, and wagon superintendent to the Bolivian Railway Co, a position he retained for six years.
Since 1919 he had been concerned with the commercial side of engineering and had held the post of chief engineer of the railway section of Messrs. Evans Thornton and Company, Buenos Aires, general manufacturers and consulting engineers, to whom he was responsible for contracts with railway companies. Mr. Mayne was elected an Associate Member of the Institution in 1909 and was transferred to Membership in 1923."