54 SURVEY OF IDAHO-MONTANA BOUNDARY LINE. [bull. 170. 
creeks, about 1,000 feet northeast from a peak, at west edge of small 
fir trees and grass, where rocks begin in ascending the peak, about 
one-third mile west of a saddle on summit ridge. This point is visi- 
ble from post 24 on the summit of the Yak Mountains and from all 
prominent intermediate points, also from post 92, on the summit of the 
Bitterroot Mountains and from intermediate points. 
73. Iron post, stamped "54.905 M.," on top of narrow rocky ridge 
bearing S. 36° E., 0.7 mile south of the summit of the Cabinet Moun- 
tains, 0.4 mile south of basin at head of West Blue Creek, amid scat- 
tering fir and pine trees. 
74. Iron post, stamped "55.58 M.," on top of rock ledge 1.4 miles 
south of the summit of the Cabinet Mountains, 0.7 mile north of West 
Blue Creek, on east slope of rocky ridge, 0. 6 mile east of the triangu- 
lation station Blacktop, and 900 feet south of a small stream flowing 
east. 
75. Iron post, stamped "56.285 M.," 2.1 miles south of the summit 
of the Cabinet Mountains, 30 feet east of West Blue Creek, 120 feet 
south of where line crosses creek under high cliff s on east side of creek, 
8 feet south of a 36-inch hemlock stump and amid heavy timber. 
76. Iron post, stamped " 57.14 M.," 2.9 miles south of the summit of 
the Cabinet Mountains, on west side of West Blue Creek and 173 feet 
south of where line crosses it, opposite almost perpendicular cliffs on 
the east side of creek, about 0.25 mile above the mouth of a canyon 
from the northeast, amid large timber just west of an old trail. 
77. Iron post, stamped " 57.975 M.," 3.7 miles south of the summit 
of the Cabinet Mountains, on a small bench on steep rocky slope, 
one-fourth mile east of West Blue Creek. 
78. Iron post, stamped "58.93 M.," 4.7 miles south of the summit 
of the Cabinet Mountains, on top of a narrow ridge, 200 feet above 
West Blue Creek and about opposite the south end of a long ridge on 
the west side of the creek, amid scattering pine trees. 
79. Iron post, stamped " 59.975 M.," 3 miles north of Clark Fork 
of Pend Oreille, on top of north bank of West Blue Creek at south 
side of large flat; in open ground. 
80. Iron post, stamped "60.79 M.," 2.1 miles north of Clark Fork, 
on flat ground, amid heavy, dense timber, about 600 feet west of edge 
of bench, where the surface descends to West Blue Creek. An old 
trail crosses the line 150 feet south of the post. 
81. Iron post, stamped "61.605 M.," 1.3 miles north of Clark Fork, 
on top of flat ridge, amid heavy timber, 30 feet southeast of a pond 
100 feet in diameter. 
82. Iron post, stamped "62.35 M.," 0.5 mile north of Clark Fork, 
on top of flat east-west ridge, amid heavy timber. 
83. Stone monument 6 feet long, 10 inches by 10 inches square, 
with an aluminum bench-mark tablet stamped "63.03 M." cemented 
