A deceptively simple show of 46 prints by the photographer Sally Mann are tucked off Madison Avenue in Gagosian’s ground floor galleries and together they present a visually and intellectually sumptuous offering. To read recent commentary on this exhibit before seeing it in person, as I did, would lead one to expect an elegiac, sad, somewhat depressing affair given that the photographs present the Lexington, Virginia studio space of Cy Twobly (a longtime, local friend of Mann’s parents) in the years leading up to his death and also given that one of Mann’s adult-aged children’s unexpectedly died during the preparation of the final prints. Consequently, I went in steeled to a degree.