Marv: Thanks SO MUCH for posting your track. Where it ends at the 13,600 elevation, did you just continue on down from there? It has got to be really steep, but maybe with crampons, you could manage it.

So glad your trip ended ok!!! Last July, this hiker's life ended in the same general area as your descent -- near Guitar Lake, above the JMT. But he tried descending through the rocks, I believe. Link: Missing man on MR -- Recovered

I am posting the image of your track here (click to enlarge)