 Parry was subsequently selected for the post of comptroller of the newly created department of steam machinery of the Navy, and held this office until his retirement from active service in 1846, when he was appointed captain-superintendent of Haslar Hospital.He reorganised the packet service, which had been transferred from the Post Office to the Admiralty in January 1837.Steamship companies were contracted to carry the mail, instead of naval vessels, on a regular schedule.