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John Harley Harley-Mason (1877-1952)
1952 Obituary 
It is with regret that we have to record the sudden death of Mr. John Harley Harley-Mason at his home at Datchet on Tuesday, March 11th.
Mr. Harley-Mason was born on December 8, 1877, and following his education at Brighton Grammar School, was trained under Mr. Maurice Wilson at the Crystal Palace School of Practical Engineering.
He was appointed an assistant at the firm of consulting engineers, Hassard and Tyrrell, in Victoria Street, London, in 1898, and in 1907 became a junior partner.
Three years after, in 1910, he joined the staff of Perry and Co., public works contractors. As contractor's engineer with that firm, Mr. Harley-Mason, amongst a number of other works, was engaged in the construction of the 1,800ft long ferro-concrete jetty at Tilbury, which is double-decked for trains, 10 miles of line for the Great Western Railway, and the subways at Elephant and Castle and Blackfriars.
When Mr. Charles Rowell died he became chief engineer to the firm. In 1922, Mr. Harley-Mason secured the appointment as new works assistant on the staff of the Underground Railways, and in January, 1938, became new works engineer of the London Passenger Transport Board. He remained with the Board until December 31, 1942, when he retired.
During his twenty years' service in connection with London's transport, Mr. Harley-Mason was responsible, under the civil engineer, for the western extension of the Piccadilly Line; new stations at Hammersmith, Aldgate East and King's Cross, and the civil engineering work on the Metropolitan Line's improvements scheme. He was also responsible for the depots at Morden, Northfields and Grange Hill.
He was a member of the Institution of Civil Engineers and a Fellow of the Royal Geographical Society.