Beginning at the point where the boundary line between the States of Wyoming and Idaho intersects the southern boundary of the Yellowstone National Park; thence easterly along the southern boundary of said park to its intersection with the western boundary line of Big Horn County, Wyoming, as defined in Sec. 982 of the Revised Statutes of Wyoming (1899); thence, in a general southerly and southeasterly direction, along said county line to the northwest corner of the Wind River or Shoshone Indian Reservation; thence, in a general southwesterly direction, along the western boundary of said reservation to its intersection with the township line between townships forty-two (42) and forty-three (43) north; thence westerly along said township line to the southwest corner of township forty-three (43) north, range one hundred and seven (107) west; thence northerly to the northwest corner of said township; thence westerly to the northeast corner of township forty-three (43) north, range one hundred and nine (109) west; thence southerly along the range line to the southeast corner of township forty-one (41) north, range one hundred and nine (109) west; thence easterly along the tenth (10th) Standard Parallel north to its intersection with the western boundary of the Wind River or Shoshone Indian Reservation; thence, in a southeasterly and southerly direction, along the western boundary of said reservation to the point for its intersection with the township line between townships thirty-three (33) and thirty-four (34) north; thence westerly along said surveyed and unsurveyed township line to the southwest corner of section thirty-four (34), township thirty-four (34) north, range one hundred and nine (109) west; thence northerly to the northwest corner of section three (3), said township; thence westerly to the southeast corner of township thirty-five (35) north, range one hundred and ten (110) west; thence northerly to the north east corner of said township; thence westerly to the southwest corner of section thirty-four (34), township thirty-six (36) north, range one hundred and ten (110) west; thence northerly to the northwest corner of section three (3), said township; thence westerly along the ninth (9th) Standard Parallel north to the southeast corner of township thirty-seven (37) north, range one hundred and ten (110) west; thence northerly along the range line to the southeast corner of township forty (40) north, range one hundred and ten (110) west; thence westerly to the southwest corner of said township; thence southerly along the range line to the southeast corner of township thirty-seven (37) north, range one hundred and eleven (111) west; thence westerly along the ninth (9th) Standard Parallel north to the northeast corner of section four (4), township thirty-six (36) north, range one hundred and twelve (112) west; thence southerly to the southeast corner of section thirty-three (33), said township; thence westerly to the northeast corner of township