Background
Slessor was born in 1831 in Sidmouth, Devon, England to Major General John Henry Slessor.
Slessor was born in 1831 in Sidmouth, Devon, England to Major General John Henry Slessor.
He attended the Sherborne School and later trained as civil engineer as a pupil of M. West. Peniston M. Institute.
Civil Engineer Slessor was responsible for sewerage works at Haileybury, Mortlake, Richmond, Barnes, and other places in the Thames valley. A large road bridge at Addison Gardens, Kensington. The renewal of the Cliff Bridge at Scarborough.
And, in conjunction with Professor Aitchison, the enlargement of the Rotherhithe repairing dock.
Abroad, he conducted an important railway trial at Riga and designed the drainage of that city. In Oporto he designed and built the Crystal Palace exhibition building.
He reported on sulphur springs in Iceland and on a government harbour at Heligoland, and carried out various works in other countries. He also worked in the Eastern Cape, South Africa.
Slessor died 15 October 1905 in Somerset, England.