This oral history interview with Don H. Marmaduke was conducted by Brian G. Booth in the offices of the Tonkon Torp law firm in Portland, Oregon, on December 6, 2002. In this interview, Marmaduke discusses his family background and early life in Portland. He talks about his college experiences at Yale University and Harvard Law School in the 1940s, and describes his social life, as well as some of his professors and fellow students. He talks about his marriage to Mary Ellen Dandy and about working as a law clerk in Boston, Massachusetts. He discusses his 1952 move back to Portland, and practicing law with the firm now known as Stoel Rives. He discusses some of the lawyers he worked with, clients he represented, and some of his pro bono work, including in Mississippi as a civil rights lawyer in the 1960s. He discusses leaving Stoel Rives in 1971 to form his own law firm, and joining Tonkon Torp in 1974. He talks about cases he handled, including cases regarding antitrust and intellectual property law. He closes the interview by talking about awards he’s won and his plans for the future.