From top: Fabric for Portae (red), 1974 Marker and pencil on vellum. 2 sheets, left 16 x 7/8 x 11 in; right 16 7/8 x 13 1/16 in. Fabric for Portae (yellow), 1974. Marker and pencil on vellum. 2 sheets, left: 16 7/8 x 10 1/8 in; right 16 7/8 x 14 7/8 in. Both courtesy of the estate of Rosemary Mayer.