Given the task definition and input, reply with output. Generate a correct and concise answer for the question based on the words in the context.

Context : Rear Admiral Lord William FitzRoy KCB (1 June 1782 -- 13 May 1857), was an officer of the British Royal Navy who served during the French Revolutionary and Napoleonic Wars, and also as a Member of Parliament.
Question : What organization was Lord William FitzRoy involved with?
Royal Navy