Oh, I could but as an expert map guy, I am going to make you do your homework. First...
Secor >>> "The High Sierra...Peaks, Passes, And Trails" page 276:
(11,343 ft: 11,280ft+ 1.4 mi N of Silver Pass)
North Buttress. II 5.8 First ascent August 15, 1988, by Galen Rowel and Kevin Worral. Ascend the buttress over excellent knobs and solid plates to the summit.
North Dihedral. I, 5.8 First ascent August 15, 1988, by Dick Duane and Sebastian Letemendia. This route climbs the large dihedral that is right of the north buttress. This route eventually leaves the dihedral and joins the north buttress.
OK, bring up this topo:http://mapper.acme.com/?ll=37.47602,-118.91919&z=13&t=T
Find Peter Pande Lake, find Red Slate Mountain. Take a straight edge and connect it between the ridge just west of the northern end of the lake and what would be "right shoulder of Red Slate ". Then consider Secor's description above you apparently have. Next drag that spot to the center cross hairs of the Acme topo, then + zoom twice to get the max zoom. Note Secor's elevation.
Better bring up Google Earth in 3D on that spot and see why Farquhar was impressed.