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Claud Albert Stainton Day (1873-1947)
1873 July 22nd. Born the son of Edmund Stainton Day, Solicitor, and his wife Ellen Brett. His great grandfather was Bryan Donkin FRS
1947 April 2nd. Died. Of 4 College Road, Isleworth. Probate to Louisa Day, Widow and John Harrison Day, Solicitor.
1948 Obituary 
"CLAUD ALBERT STAINTON DAY, who had a long connection with electrical engineering, was associated with the firm of Messrs. Kennedy and Donkin, consulting engineers, of Westminster, for over thirty years. He was educated privately and took a short engineering course at University College, London.
On the termination of a three years' apprenticeship with Messrs. Bryan Donkin and Company, Ltd., general engineers, of Bermondsey, in 1894, he remained with that firm as a draughtsman for a further six years. He then secured an appointment as draughtsman and tester with the Waterloo and City Railway and two years later joined the staff of Messrs. Dick Kerr and Company, Ltd., in London, with whom he was engaged in a similar capacity until 1911, when he began his long connection with Messrs. Kennedy and Donkin as assistant engineer, which lasted to the end of his career.
Mr. Day had been an Associate Member of the Institution for forty-eight years, having been elected in 1899. He was also an Associate Member of the Institution of Civil Engineers. His death occurred at Isleworth, Middlesex, on 2nd April, in his seventy-fourth year."