The Tract House: A Darwin Addition was commissioned by the American Philosophical Society (APS) Museum as part of the city-wide graphic arts festival Phikagrafika in 2010. The Tract House: A Darwin Addition was located a few blocks from the APS Museum and a walking map of sites to look for along the way was produced to accompany the installation. The Tract House: A Darwin Addition, included 63 tracts. More information and photographs of The Tract House: A Darwin Addition can be found here.