Bit of a puzzle, this one. Walter Bailey's website lists 'Light On Shadow' as one of his Grizedale works, but it wasn't featured in the 1995/96 guide map with 'Cloak Of Seasons' and 'Seed', so I can't be sure where it was.

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Not the best picture, I'll admit, but this image from the Grizedale Archive display in the Yan a few years back is all we've got to go on. It may have been little more than a prototype for 'Seed', since it bears such a strong resemblance.

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Also by this artist:

Cloak Of Seasons 1995

Seed 1995

Threshold Figure 1997