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Richard Thomas Hall (1823-1889)
1890 Obituary 
. . . . On the expiration of his pupilage in 1844, Mr. Hall was employed by Joseph Locke, Past President Inst. C.E., on surveys in Devonshire and Cornwall, and four years later he was appointed engineer of the Redruth and Chasewater mineral railway, a position he retained, with the additional office of general superintendent, for twenty years.
In 1868, the Cape Copper-Mining Company engaged Mr. Hall to survey and construct a railway between their mines at O’okiep and Port Nolloth, with a jetty at the latter place, the railway being about 90 miles in length. He remained in charge of the work till March, 1875, when he accepted the appointment of railway engineer to the South African Republic, and in this capacity superintended the extremely difficult work of surveying the proposed railway from Pretoria to Delagoa Bay. . . . [more]