Idaho Code § 31-138
Oneida county is described as follows: beginning at a point where the one hundred thirteenth (113th) meridian west from Greenwich intersects with the southern line of township twelve (12) south;
Western boundary. Thence south along the said meridian to a point where said meridian intersects with the northern boundary line of the state of Utah (R.C., section 23s);
Southern boundary. Thence easterly along said boundary line to a point on the boundary line between the states of Utah and Idaho, where the same is intersected by the section line between sections twenty-six (26) and twenty-seven (27), township sixteen (16) south, range thirty-seven (37) east;
Eastern boundary. Thence in a northerly direction along the section line as now surveyed to the southeast corner of section twenty-seven (27), township fourteen (14) south, range thirty-seven (37) east; thence easterly along said section line as now surveyed to the southeast corner of section twenty-six (26), township fourteen (14) south, range thirty-seven (37) east; thence continuing easterly along said line to a point which, when surveyed, will be the southeast corner of section twenty-five (25), township fourteen (14) south, range thirty-seven (37) east; thence northerly along the western boundary of township fourteen (14) south, range thirty-eight (38) east, as now surveyed, to its intersection with the boundary line (1913, ch. 5, section 2, pp. 22, 23) of Bannock county; thence west along the boundary line of Bannock county to a point on the top of the range west of a point one (1) mile south of the present southern boundary of the townsite of Oxford; thence northwesterly along the crest of the mountains between Malad and Marsh valleys to an intersection of the township line between ranges thirty-six (36) and thirty-seven (37) east, Boise meridian, thence north to the east quarter (E1/4) corner of section twenty-five (25), township twelve (12) south, range thirty-six (36) east, Boise meridian; thence west through the center of sections twenty-five (25), twenty-six (26), twenty-seven (27) and to the center of section twenty-eight; thence south on the north and south center line of sections twenty-eight (28) and thirty-three (33), township twelve (12) south, range thirty-six (36) east, Boise meridian, to the top of the crest of the mountains between Malad and Marsh valleys; thence northwesterly along the crest of the mountains between Malad and Marsh valleys to the southeast corner of section twenty-four (24), township eleven (11) south, range thirty-five (35) east, Boise meridian; thence following the unbroken crest of the main mountain range to the northwest corner of section twenty-three (23), township eleven (11) south, range thirty-five (35) east; thence north one-half (1/2) mile, to the quarter corner between sections fourteen (14) and fifteen (15); thence west one (1) mile to the quarter corner of sections fifteen (15) and sixteen (16); thence north one-half (1/2) mile, to the northwest corner of section fifteen (15); thence west one-fourth (1/4) mile; thence north one-half (1/2) mile; thence west one-half (1/2) mile; thence north one-half (1/2) mile; thence west one-fourth (1/4) mile, to the northwest corner of section nine (9), township eleven (11) south, range thirty-five (35) east; thence north one (1) mile, to the northwest corner of section four (4), township eleven (11) south, range thirty-five (35) east, which is the point of intersection with the township line between townships ten (10) and eleven (11) south, range thirty-five (35) east;
Northern boundary. Thence west along and upon the south line of said township ten (10), to a point on said line two (2) miles east from the southeast corner of township ten (10) south, range thirty-three (33) east (1913, ch. 6, section 2, p. 32); thence south to a point where the line thus drawn intersects the line between townships eleven (11) and twelve (12) south, range thirty-four (34) east (1915, ch. 132, section 2, p. 288); thence west along and upon the south line of said township eleven (11) south, to the southeast corner of township eleven (11) south, range thirty-two (32) east; thence south upon the township line to the southeast corner of township twelve (12) south, range thirty-two (32) east; thence west upon and along the southern line of said township twelve (12), to the place of beginning (1913, ch. 6, section 2, p. 32).
Idaho Code § 31-138