Philip Thicknesse, lieutenant-governor of Landguard Fort, was a younger brother.
629), but did not retire from his office till 1769, when the governors of St. Paul's awarded him a pension of 100l.
Thicknesse, on his retirement, resided with an old schoolfellow, William Holbech, at Arlescote, near Warmington, Northamptonshire, till the death of the latter in 1771.
He himself died, unmarried, on 18 December 1790, and was buried on the north side of Warmington churchyard, in accordance with somewhat singular directions which he had given (ib.
A marble bust of him by John Hickey, with an inscription, the joint work of Sir Philip Francis and Edmund Burke, was placed in St. Paul's school by his pupils in 1792.