Distinguishing Characteristics
The distinguishing characteristics of Rennie's work were firmness and solidity, and it has stood the test of time. He was most conscientious in the preparation of his reports and estimates, and he never entered upon an undertaking without making himself fully acquainted with the local surroundings. He was devoted to his profession, and, though he was a man of strong frame and capable of great endurance, his incessant labours shortened his life. He was elected Fellow of the Royal Society on 29 March 1798, and in 1815 he served as a Manager of the newly built London Institution.
He died, after a short illness, at his house in Stamford Street, London, on 4 October 1821, and was buried in St. Paul's Cathedral. He married early in life Martha, daughter of E. Mackintosh, who predeceased him; by her he left several children, two of whom, George and John, became notable engineers.
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