Subject to valid rights and entries initiated under the public land laws, prior to June 7, 1924, any or all of the following described lands in Government ownership may be withdrawn from entry and disposition by proclamation of the President for the purpose of protecting and propagating antelope and other game animals and birds: National forest lands—Township 18 north, range 7 east, Black Hills meridian, section
24, south half, and south half north half; section
25, all; township 18 north, range 8 east, sections
17 to
20, inclusive; section
21, west half; sections
29 to
32, inclusive. Public lands—Township 18 north, range 7 east, sections
5 to
9, inclusive; sections
13 to
23, inclusive; section
24, north half north half; sections
26 to
36, inclusive; and those parts of sections
3,
4,
10, and
11 lying south and west of the Riva Road. The withdrawal of the lands herein authorized shall not affect withdrawals for national forest purposes made prior to June 7, 1924.