Primary records for the Dukes of Buckingham and Chandos are now in several locations. These include: 

• The Huntington Library, San Marino, California. The Library holds the largest set of letters, accounts and maps relating to the family; more than 350,000 in all. 
• Centre for Buckinghamshire Studies (previously Buckinghamshire Record Office). 
• Public Record Office.
• Newspapers
• Boddington Private Collection