Bulldog, I am pretty sure I found the Rockwell shortcut through the slabs that avoids the Mirror Lake switchbacks when I was on my unplanned detour and frolic on the way down that time (once I saw the stunning stealth campsites, I had an "aha" moment). However, the shortcut gets you back on the trail past the slabs at the point you and I had been discussing that is above Mirror Lake. The picture depicts an area much higher above that and I, too, doubt there is a summer shortcut in this area.
