TLS, one page, 8.5 x 11, October 23, 1976. Marx writes Julie Coopersmith regarding his life story. In full: “This is to confirm that I have authorized Hector Arce to write the comprehensive biography of my life, and that I have pledged my cooperation with his efforts. I look forward to seeing you in Washington. My kindest personal regards.” Some scattered creases and wrinkles, none affecting his signature, otherwise fine condition. Accompanied by a full letter of authenticity from PSA/DNA and an unsigned photo. RRAuction COA.
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