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John Jabez Geach (1840-1883)
1880 Executive Engineer, Severn Tunnel Works, New Passage, near Bristol.
1884 Obituary 
JOHN J. GEACH was born at Ashburton, Devonshire, on 21st October 1840; and died at Weston, Bath, on 24th December 1883, aged forty-three.
Afterwards he had charge of the erection of several bridges, one in Bristol; and was also employed on the Bristol harbour railway.
In 1871 he was engaged on the works of the Severn Tunnel near Portskewett, and remained there until 1880. The rock-drills and other machinery used at the tunnel were from his own designs, and a description of them was given in his paper at the Bristol meeting of the Institution in 1877 (see Proceedings 1877, Page 206).
He became a Member of the Institution in 1878.