Ships Cover for the Orion class battleships HMS Conqueror (1911), HMS Monarch (1911), HMS Orion (1911) and HMS Thunderer (1911). The documents in this cover primarily comprise schemes of complement detailing changes that accompanied alterations to the ship, and items relating to the post-War use of HMS Thunderer (1911) as a training ship. The papers cover the period February 1914 to July 1925.