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Ezekiel Grayson Constantine (c1858-1934) President of the Manchester Association of Engineers.
c1858 Born at York the son of Miles Constantine, an engine fitter, and his wife Ann
1911 Living at 87 Tulse Hill, London: Ezekiel Grayson Constantine (age 53 born York), Engineer (Mechanical), Managing Director of Building Company. With his wife Lucy Constantine (age 54 born St. Austell). Three servants.
1934 Obituary 
EZEKIEL GRAYSON CONSTANTINE was for many years in business on his own account as a consulting engineer, and was also managing director of the Stirling Boiler Company, first at their works at Motherwell and later in London.
He was born at Marsden, Yorkshire, and educated at the Merchant Taylors' School. His apprenticeship was served from 1873 to 1876 under his father, the late Miles Constantine, locomotive superintendent at the Par works of the Cornwall Minerals Railway, which was later absorbed by the Great Western Railway.
He then served for two years with the Liverpool and Great Western Steamship Company in their works at Liverpool, and in 1878 he went to sea for six years. In 1883 he obtained a first-class Board of Trade certificate. For the next two years he was boiler inspector to the National Boiler Insurance Company, now the National Boiler and General Insurance Company, and then began to practise as a consulting engineer in Manchester.
He was later appointed representative of the Stirling Company of America, which later became the Stirling Boiler Company. In 1905 he was made manager and was subsequently appointed managing director.
He resigned this position in 1916 and retired to Newquay, Cornwall, where his death occurred on 4th March. 1934.
His age was 76, and he had been on the roll of the Institution as a Member since 1888, a period of forty-six years.