For the purpose of protecting park deer along the western boundary of the Yosemite National Park, the Secretary of the Interior is authorized to acquire as part of said park, by exchange as hereinafter provided, title in fee for and on behalf of the United States of America to all that land in sections 21 and 28 in township 3 south, range 20 east, Mount Diablo meridian, lying between the abandoned railroad grade running from a point in the Wawona Road near Chinquapin to the top of the abandoned incline hoist in the northeast quarter of the southwest quarter of section 21, and the east and west center line of section 21, and in sections 22, 23, 24, 25, 26, and 27 lying between said abandoned railroad grade and the existing park boundary, containing one thousand three hundred and fifty acres, more or less, now held in private ownership, which lands upon acquisition shall be, and are, added to the park; and in exchange therefor the said Secretary is authorized to issue patent to the owner of said lands, for the Government lands described as follows: That part of the north half of northeast quarter lying south of abandoned railroad grade hereinbefore mentioned, north half of southwest quarter of northeast quarter, southwest quarter of southwest quarter of northeast quarter, southwest quarter, west half of northeast quarter of southeast quarter, and southwest quarter of southeast quarter of section 25, township 3 south, range 20 east; north half section 36, township 3 south, range 20 east; southwest quarter northeast quarter, south half northeast quarter northwest quarter, west half northwest quarter, southeast quarter northwest quarter, northwest quarter southeast quarter, and west half southwest quarter southeast quarter section 32, township 3 south, range 21 east; and northwest quarter section 5, township 4 south, range 21 east; containing one thousand and ten acres, more or less, which lands upon issuance of patent shall be, and are eliminated from said park.