[1] He left in 1812 to become Rector of St Andrew's Church, Haughton-le-Skerne, County Durham – a position he held until his death.
Le Mesurier was always close to the government of the day, and after Lord Sidmouth's short period as Prime Minister became his private chaplain, advising him on how he should combine the art of politics with adherence to the principles of the Established Church.
His political and religious views were strongly held, and in August 1820 it is reported in The Times that Le Mesurier "had thought proper to stop the mouth of [a] boy with his fist" when the fourteen-year-old in Haughton-le-Skerne shouted out his support for Lambton, a local government candidate.
Dr. James Bandinel of Netherbury, Dorset (a previous Bampton Lecturer), and had fifteen children by her.
The resultant drain on his income caused him to write to Lord Sidmouth in January 1822 asking for the prebendal stall at Westminster vacated by Dr Blomberg.