Some remarks by Doris Leonard, his wife, also included. Study of law, University of California, Berkeley; service during World War II; long association with Sierra Club (serving also as secretary and president) with information on the Club's main battles (dam construction, water and power rights, and logging in national parks, recreation facilities in wilderness areas, nuclear energy and power plants, multiple use and clearcutting in national forests), on the David Brower controversy, on Club litigation with lumber companies, and on more recent Club concerns; experiences mountaineering and the formation of the Club's Committee on Rockclimbing; work with U.S. National Park and Forest Services, and as a member of the Governor's Redwood Park Commission, and with other conservation organizations; organization of the Sierra Club Foundation and the Trustees for Conservation; the Wilderness Act and its impact.