Jam up the dihedral, then traverse to the right, until you can reach the block on the ledge (be careful, the block has unknown stability). Mantle up on the ledge, and carefully walk around and down.
Walk East in the valley past Gollum until you see the tall boulder with a prominent dihedral facing South. Climb it.
A few pads and spotters, the technical crux is lower, but if you fell while mantling on the ledge you could be in a world of hurt.