ORDNANCE OFFICE. The business of the Office of the Master-General and Board of Ordnance is conducted at No. 86 Pall Mall, and at the Tower of London. The stores are kept at the Tower, and the correspondence is carried on at the office in Pall Mall. The total cost of the whole establishment is about 55,000l. a year. 

Peter Cunningham, Hand-Book of London, 1850