Related records can be found in several other archive services. The most significant holdings are at:
The Rothschild Archive
The Rothschild Archive, in London who hold records relating to the N. M. Rothschild bankin the City of London, some members of the Rothschild family and other Rothschild properties:
Buckinghamshire Archives
Buckinghamshire Archives in Aylesbury hold records relating to the history of Buckinghamshire including records of organisations, business and individuals; some o these relate to Waddesdon:
The Central Zionist Archives
The Central Zionist Archives of the World Zionist Organisation in Jerusalem hold records relating to the administration of the Rothschild settlements and PICA in Palestine and Israel and the Hadassah Medical Organisation: