Brundage’s personal incoming and outgoing correspondence is arranged in this series. Correspondence primarily relating to the College of Complexes or Culture Vulture is filed in Series 4 or Series 5, respectively. Series 6 also contains some pieces of correspondence pertaining to Brundage’s legal disputes.

The correspondence in this series covers a wide range of topics, from requests for information about health insurance, to scheduling a holiday party. A fair amount of the correspondence consists of cover letters for unsolicited articles, or ideas for articles, sent to various magazines for publication consideration, together with rejection letters from these same magazines. In addition, there is also a substantial amount of correspondence relating to Brundage’s efforts to find work as a painter in 1965 and 1972, and his dealings with the Social Security Administration, Internal Revenue Service, and Chicago Painters and Decorators Union and Welfare Fund about his taxes and entitlement to benefits. The folder in this series labeled “Newberry Library” contains correspondence between Brundage and the Newberry Library relating to the donation of his personal papers to the institution, as well as a couple of letters to and from Roy Alexander, Brundage’s friend and sometime agent, concerning the same subject.