Proby entered the navy and served at the Nile and Trafalgar. His father’s friends promoted him in 1806 and were about to award him an appointment in the court of Admiralty at St. Lucia when they were dismissed from office in 1807.
Although Proby made no known speech in debate, he voted steadily with the Grenvillite opposition in the session of 1817, supporting the suspension of habeas corpus on 26 Feb.
