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Robert Trefusis Mallet (1837-1913)
1851 At school in Acton, Cheshire
1901 Retired civil engineer living in Brompton, London
1911 Living in Earls Court London, a boarder, retired civil engineer, Indian Government pensioner
1914 Obituary 
ROBERT TREFUSIS MALLET, born in Dublin on the 6th March, 1837, died at South Kensington on the 15th November, 1913.
He first went to India in 1856, when he was employed for some years on the East Indian Railway.
After gaining further experience in Europe, he returned to India in 1868 and was appointed Executive Engineer on the Punjab Northern State Railway, where he built the Ravi bridge.
Subsequently he was transferred to the Indus Valley Railway as Engineer-in-chief, and afterwards acted in a similar capacity on the Rewari-Ferozepur Railway, designing and building the Ferozepur Bridge, and on the North Western State Railway.
He acted for a time as Director General of State Railways and as Consulting Engineer to Government for the central division, retiring in 1892 with the rank of Chief Engineer.
Mr. Mallet was elected an Associate of The Institution on the 5th May, 1863, and was transferred to the class of Members on the 5th December, 1876.