Acting as poetic records of light, the poems in Variations on Dawn and Dusk follow the sun as it warms, cools, colors, and shifts the space of Robert Irwin's untitled (dawn to dusk) in the desert of Marfa, TX. Built on the footprint of the town's old hospital, Irwin's permanent installation is a remarkable structure with walls, windows, and screens that both capture and are taken over by the sun's changing light. Through this deeply engaged ekphrasis,...