An easy low-angle face leads to a short but physical offwidth through a section of black varnish. The climb then opens up into a large chimney with easy climbing over poor rock; not much pro for this part. This climb would get more stars if it was all like the bottom section, without the chossy chimney up high. However, this is still a good route if you want to work on some 5.9 offwidth technique.
Location
The obvious crack in the large left-facing corner to the left of Ragged Edges. To descend, either rap off a slung tree to the left, or head right to the Ragged Edges walk off.
Just to fill out the record ... Leslie Hamilton and I followed Joe on the FA of this route in 1973. On page 131 of Red Rock Odyssey is a photo I took of Joe leading the crux with piton hammer and EBs. The Theme Book turned out to be our warmup for the FA of Rainbow Wall, which Joe and I climbed over the next three days.