James Cornwall Langdon (1853-1895)
1896 Obituary 
JAMES HENRY CORNWALL LANGDON, born at St. Heliers, Jersey, on the 5th February, 1853, was articled in 1868 to A. B. Campion, Borough Surveyor of Neath, Glamorganshire, whom he assisted in the design and construction of the drainage of that town.
He then served for seven years on the engineering staff of the Midland Railway, as an assistant in the southern division.
In 1877 Mr. Langdon proceeded to South Australia, and in March of the following year was appointed City Surveyor and Engineer of Adelaide, which post he held until his death at Barrow Hill, near Chesterfield, on the 5th of August, 1895. Mr. Knighton’s charge of these important works, which he held first under Mr. Markham, and subsequently under Mr. George Bond, the recently deceased General Manager, was fulfilled with energy and zeal, and in him the workmen of the district have lost a good friend.
For twenty years he served as a lieutenant in the local Volunteer corps. He was also a Freemason and an able musician, playing the violin with great skill.
Mr. Knighton was elected an Associate Member on the 7th April, 1891.