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David Thomas Rhys Protheroe (1856-1896)
1896 Obituary 
DAVID THOMAS RHYS PROTHEROE, born on the 30th of June, 1856, commenced his engineering career in 1872 as a pupil of Mr. Benjamin Lawrence, of Newport, Mon., with whom he subsequently remained as an assistant.
He was then engaged from May, 1879, to October, 1880, on drainage work for Mr. Edward F. Griffith, of Westminster, after which he was employed for two years under Mr. Alfred Williams in preparing drawings for, and in assisting to carry out, part of the Chislehurst and Crays Valley drainage for the Bromley Rural Sanitary Authority.
In 1882 Mr. Protheroe became Chief Assistant to Messrs. Gotto and Beesley, and on Mr. Gotto retiring from the firm in 1890, he remained with Mr. Beesley for two years in a similar capacity.
During that time he was engaged in preparing contract drawings for drainage works at Rio de Janeiro, the drainage and water supply of Campos (Brazil), and the drainage of Brentford, Chatham, Cheshunt, Hayes and other places.
Mr. Protheroe resided from 1893 at Fleur-de-lis, near Cardiff, where he died on the 2nd of April, 1896.
He was elected an Associate Member on the 12th of January, 1892.