Two cracks linked by two bolts. Tricky and slow going in between the two, then cruxy in the second. To finish, you could either bust left over the bulge into Unknown route 1. Or, stay right in wide crack that would take you near 'Thrain's" anchors (2 rope rap). I'm not sure how the finish was originally intended. There is a buttonhead/leeper anchor at the end of the first crack (5.10-?), Shaffer? came along and put in the extension which is the upper overhanging seam.
About 15' west of other Unknown route. Begins in the finger/hand size crack.
Single set to 2" (save green and red C3's for the top)