South-facing (but shaded) wall on the upper cliff a ways northeast from Tower Wall. Just right of the Albion sector and just left of the Devonshire slab. There is a little "guard tower" (the Cleft Bastion) at the top of the cliff above the corner at the left side of the wall; to its right usually a wet area in the left center of the wall; and another (higher) little "guard tower" (the Keep) at the top of the right half of the wall, just left from above the obvious Moat gully; then farther right another obvious gully is the approximate boundary between Shadow Castle sector and the Devonshire slab sector.
Top-Roping: To set up a top anchor, traverse right (East) under the base of the Devonshire slab, and continue past a steep loose gully and under the Jumble Hotel crag, almost to the base of the Puzzle Palace crag. Scramble up the steep left-trending gully (careful of loose sections) on the left side of Puzzle Palace, then horizontal Left (SouthWest) along the top of the cliff.
warning: The rock on and around this cliff has not been climbed much yet, and much of the rock is still breakable and loose -- so the belayer and other people should stand far away from underneath the climber.
. . . (Lots of vegetation on this rock as of 2015. Be prepared when climbing to navigate around protruding trees and branches, and dealing with holds slippery with grass, lichen, moss, dirt).