OLMSTED REPORT ON MANAGEMENT OF YOSEMITE, 1865. THE YOSEMITE VALLEY AND THE MARIPOSA BIG TREE GROVEBy Frederick Law Olmsted 1865. It is a fact of much significance with reference to the temper and spirit which ruled the loyal people of the United States during the war of the great rebellion, that a livelier susceptibility to the influence of art was apparent, and greater progress in the manifestations of artistic talent was made, than in any similar period before in the history of the country.