This local feeling resulted in immediate attempts to change the park boundaries. The first attempt was frustrated largely through the efforts of the Sierra Club. This organization came into existence shortly after Yosemite National Park was created and has always been one of the most important agencies that have promoted the safety of Yosemite treasures. Its publication, the _Sierra Club Bulletin_, which first appeared in 1893, is a rich source of Yosemite history. For twenty-two years John Muir was the president of the club. His vim in leaping to the defense of the great natural preserve was no less than had been his vigor in working for its creation. Muir aided in the preservation of national monuments as well. In early May, 1903, Theodore Roosevelt, then president, visited Yosemite via Raymond and the Mariposa Grove. Governor George C. Pardee, Benjamin Ide Wheeler, president of the University of California, and John Muir were among those who interpreted the scene for the President. Conservation matters were discussed by Muir and the legislation which was to become famous as the Antiquities Act of 1906 was given some definition at this time. It was truly an important occasion. Chief among the Sierra Club defenders of Yosemite who have carried on since the death of Muir is William E. Colby. He served forty-four years as secretary of the organization, two years as president, and is now, as a director, a frequently sought source of counsel. He led the club’s summer outings for more than three decades. Throughout this period Colby has unceasingly built the Sierra Club’s prestige in the field of conservation. For the past six years he has served as a member of the Yosemite Advisory Board, and has been in close touch with past and current park problems. The failure of the national government to provide funds with which to extinguish private claims within the park involved the administration in difficulties which are being felt even yet. By 1904 relations between administrative officers and the large number of owners of private holdings had become so strained that legal action was imperative. Boundary revisions were required. Major Hiram M. Chittenden headed the commission appointed to investigate possible boundary changes. Upon the recommendation of this commission large areas on the east and west were lopped off. In 1906 a tract on the southwest was cut off, and since that time small changes have been rather numerous. Private lands still exist within the park and constitute an ever-present source of trouble.