Under his superintendency practically all the innovations which today characterize the public service of a national park were instituted in Yosemite. Motor buses replaced horse-drawn stages; tolls were eliminated on all approach roads; the operating companies were reorganized and adequate tourist accommodations were provided at Glacier Point and Yosemite Valley; a modern school was provided for local children; the housing for park employees was improved; the best of electrical service was made available; the park road and trail system was enlarged greatly and improved upon; the construction of an all-year highway up the canyon of the Merced made the park accessible to a degree hardly dreamed of; provision of all-year park facilities met the demands of winter visitors; a new administrative center was developed; the Yosemite High Sierra Camps were opened; and an information service was devised. The ranger force was so organized as to make for public respect of national park ideals and personnel. The interpretive work, which makes for understanding of park phenomena and appreciation of park policies, was initiated in Yosemite and has taken a place of importance in the organization of the entire national park system. In short, the present-day Yosemite came into existence under the hands of Lewis and his assistants. How well the demands of the period were met and future requirements provided for is evidenced by the continued healthy growth and present success of the Yosemite administrative scheme. In the fall of 1927 Lewis was stricken by a heart attack. He later returned to his office, but in September, 1928, it became apparent that he should no longer subject himself to the strain of work at the high altitude of Yosemite Valley. He removed to West Virginia, and there partly regained his strength. Director Mather then sought his services as Assistant Director of the National Parks, and in that capacity he functioned until the summer of 1930. His physical strength, however, failed to keep pace with his ambitious spirit, and after another attack, he died at his home in a Washington suburb on August 28, 1930.