Johnson’s first photography studios were the driveway and back steps of his house, but soon he was carrying a pocket-size camera on his daily outings to nearby beaches, parks, and cemeteries. In spring 1992, he threaded a cutout silhouette of Joseph Cornell over the cord of a payphone, then photographed it with one hand while holding the receiver with the other—acting as operator of a hotline to the collage-art pioneer.