Mather did go to Washington as assistant secretary of the Interior, and lobbied for the establishment of a bureau to operate the national parks. On August 25, 1916, President Woodrow Wilson signed the bill authorizing the National Park Service. At the time, the government owned 14 parks and 19 national monuments, many administered by Army officers or political appointees, as battlefields were among the first parks designated. He used his personal funds to hire Robert Sterling Yard to work with him on publicizing the great resources of the parks. Mather was effective in building support for the parks with a variety of politicians and wealthy corporate leaders. He also led efforts to publicize the National Parks and develop wider appreciation for their scenic beauty among the population. He appointed Yard as head of the National Park Education Committee to coordinate their various communication efforts. In April 1917, Mather was appointed as its first director, a position he filled until he resigned due to illness in January, 1929. During the course of his career, he and his staff molded the NPS into one of the most respected and prestigious arms of the federal government. Special credit is owing Horace M. Albright, another Sierra Club member, who served as assistant to Mather, and acting director during Mr. Mather's illnesses.