The Sense of Order A Book by E. H. Gombrich The Tiling Patterns of Sebastien Truchet and the Topology of Structural Hierarchy perceptionartorder
Pointing "Originally I marked these places, quite literally. I laid a small concrete block flush to the ground at the place where I was standing and stretched a stainless steel piano wire out toward the horizon. It might go off a mile; it simply pointed in a direction. And that was the piece." Lawrence Wechler & Robert Irwin, Seeing Is Forgetting the Name of the Thing One Sees Pointing at things place