Sissinghurst Castle Garden, Kent (Accredited Museum)
National Geographic Society
575 Wandsworth Road, London
National Geographic Society (U.S.). Cartographic Division
Shaw's Corner, Hertfordshire (Accredited Museum)
United States. Army. American Forces in Germany, 1918-1923
Frank Homer Curtiss (1875-1946)
Nuffield Place, Oxfordshire (Accredited Museum)
National Geographic Society (Washington, D.C.)
Oxburgh Hall, Norfolk (Accredited Museum)
Lyme, Cheshire (Accredited Museum)
Wightwick Manor, West Midlands (Accredited Museum)
Charles Lee Dearing (1903-1972)
Washington, D.C
Greenway, Devon (Accredited Museum)
Thomas Wilson (1832-1902)
Fenton House, London (Accredited Museum)
Washington D.C
Coleton Fishacre, Devon (Accredited Museum)
International Commission to Inquire into the Causes and Conduct of the Balkan Wars
United States. Army. Corps of Topographical Engineers
Calke Abbey, Derbyshire (Accredited Museum)
Leiter, Levi Ziegler, 1834-1904
Kedleston Hall, Derbyshire (Accredited Museum)