The rector of St Magnus between 1792 and 1808, following the death of Robert Gibson on 28 July 1791, was Thomas Rennell FRS. Rennell was President of Sion College in 1806/07. There is a monument to Thomas Leigh (Rector 1808–48 and President of Sion College 1829/30, at St Peter's Church, Goldhanger in Essex. Richard Hazard (1761–1837) was connected with the church as sexton, parish clerk and ward beadle for nearly 50 years and served as Master of the Parish Clerks' Company in 1831/32.