Spirit Keeper is a stainless steel abstract sculpture consisting of a leaf-shaped form perched atop a form that is rectangular at the bottom and narrow at the top. These two pieces are welded together to create the sculpture. The entire sculpture is 78 inches tall and sits on a metal base 40 inches square, which is bolted to a concrete slab. The surfaces of the sculpture are shiny stainless steel but have been lightly sanded to create a pattern in the steel. There is an inscription on the proper left side of the sculpture in the lower proper right corner, which reads “SPIRIT KEEPER, S. WOOLDRIDGE, 2007.”
From

http://www.publicartarchive.org/work/spiritkeeper#date