[This collection of nine silkscreened prints represents individual pieces of sidewalk concrete found in the Mission of San Francisco, California. Concrete is an elemental building block of modern cities. It is porous, and it readily collects the marks of human passings. It also swells and breaks with the weather and the movements of the earth. When money comes to a neighborhood, sidewalks are more frequently torn up and relaid smooth, but many neighborhoods retain worn and weathered segments. This is a record of specific pieces of concrete as they were in 2012. You may follow the map to visit the site of each drawing. You may see the actual sidewalk, or you may see that it has changed.]