{"value"=>"<p>Series 4 contains records for the photography studio he operated in Beverly Hills. While Burden never truly abandoned his business here, the marked reduction in files after 1957 related to his studio business is evidence of the amount of time Burden focused on his photographic essay projects and other fine arts works. Included here are files of jobs to be billed or waiting for payment, billing statements, and customer receipts.</p> <p>Series 4 also contains information on the photographs and photographic material Burden mailed to museums, friends, and customers. Included here are records on the various negatives and photographs both shipped and received by Burden during the years 1962 to 1985. Of interest here are the works mailed to the monks at Gethsemani, shipping information on the photographs taken by Dorothea Lange of his daughter's wedding, and information on the many prints shipped which were used in various publications and the insurance claim forms that went with them.</p> <p>Box 17 contains the information Burden collected on equipment maintenance and photographic preservation. Included are warranty records for cameras and other equipment, articles on archival film storage and photograph preservation, equipment catalogues, various owner manuals, receipts for the delivery and mounting of his photograph collection, rental receipts for equipment used, sales receipts for equipment purchased, and information on film storage and retouching.</p>"}