Beginning in the mid-channel of the Yellowstone River at a point which is the northwest corner of section No. 36, township No. 2 north of range 27 east of the principal meridian of Montana; thence running in a southwesterly direction, following the top of the natural divide between the waters flowing into the Yellowstone and Clarks Fork rivers upon the west and those flowing into Pryor Creek and West Pryor Creek on the east, to the base of West Pryor Mountain; thence due south and up the north slope of said Pryor Mountain on a true meridian line to a point 15 miles due north from the established line between Montana and Wyoming; thence in a due easterly course on a parallel of latitude to a point where it intersects the mid-channel of the Big Horn River; thence following up the mid-channel of said river to a point where it crosses the Montana and Wyoming State line.

And whereas it is stipulated in the eleventh clause or section of said agreement that all lands upon that portion of the reservation by said agreement ceded which prior to the date thereof had been allotted in severalty to Indians of the Crow tribe shall be retained and enjoyed by them; and

Whereas it is provided in the twelfth clause or section of said agreement that, in accordance with the provisions of article 6 of the treaty of May 7, A.D. 1868, said cession of lands shall not be construed to deprive without his or her consent any individual Indian of the Crow tribe of his or her right to any tract of land selected by him or her in conformity with said treaty or as provided by the agreement approved by Congress April 11, A.D. 1882; and

Whereas it is further provided in said twelfth clause or section that in ratifying said agreement the Congress of the United States shall cause all such lands to be surveyed and certificates duly issued for the same to said Indians, as provided in the treaty of May 7, 1868, before said ceded portion of the reservation shall be opened for settlement; and

Whereas by the thirteenth clause or section of said agreement of December 8, 1890, it is made a condition of said agreement that it shall not be binding upon either party until ratified by the Congress of the United States, and when so ratified that said cession of lands so acquired by the United States shall not be opened for settlement until the boundary lines set forth and described in said agreement have been surveyed and definitely marked by suitable permanent monuments, erected every half mile wherever practicable, along the entire length of said boundary line; and

Whereas said agreement was duly ratified and confirmed by the thirty-first section of the act of Congress approved March 3, 1891; and

Whereas it is provided in section 34 of said act of March 3, 1891—­