Several readers have questioned how it could be that the “glowing red sign” to the left of the skyscraper that dominates Georgia O’Keeffe’s painting that ran on the back cover of our February/March issue could be “a tribute to her husband, the photographer Alfred Stieglitz.” And well might they ask. A very unfortunate (and, we say thankfully, rare) printing error reduced O’Keeffe’s vibrant, sharp-edged canvas to bruised murk. Here is how it should have looked, and what showed as a red blur on our cover is in fact a sign spelling out STIEGLITZ . We apologize, too, to Fisk University, in Nashville, Tennessee, which owns the painting.