Quadrangular storehouse building, designed, built and operated as the nerve centre of the whole of the Royal William Yard; begun in 1829, this was the second building to be constructed on the site. All administration was carried out here and it served as a major storehouse for food, clothing and equipment. As of 2014 it was scheduled to be converted into a hotel. The central cupola contains the yard's original (and still functioning) quarter-chiming clock of 1831 by Benjamin Lewis Vulliamy.