at a white father, at a punishing culture of enlightenment that viewedAfrican blood as intrinsically inferior, as “taint.”Natasha TrethewayTrethewey was born in 1966 in Gulfport, Mississippi. The marriage ofher black mother and white Canadian father, a poet and one-timeboxer, broke the state law against miscegenation. Her parentsdivorced when Trethewey was young, and her mother remarried anabusive man. In 1985, while Trethewey was at college, her motherwas killed by her second husband, whom she had divorced. Theseturbulent biographical facts form the core of Trethewey’s poetry,personal anguish finding echoes in the wider suffering of blackAmericans and, in her latest poems, in the dehumanization of coloredpeople across the Americas.Images frequently inspire Trethewey’s poetry. They are where shefinds history: family pictures, vintage photographs. (Her second book,“Bellocq’s Ophelia,” makes use of E.J. Bellocq’s famous photos of amulatto New Orleans prostitute of the early 1900s.) In “Thrall,” sheunearths a genre of Mexican colonial painting known as Castapainting, which depicts a complicated taxonomy of mixed-racechildren produced by a variety of interracial unions. (Trethewey has