The Carter's earliest oil painting by Georgia O'Keeffe, Series I--No. I has traveled to the Whitney Museum of American Art in New York for the exhibition, Georgia O'Keeffe: Abstraction. You can see the Carter's painting on the Whitney's website and reproduced on the cover of the exhibition catalog.
Series I--No. I will be at the Whitney until January 2010, when the exhibition travels to the Phillips Collection in Washington, D.C. and then on to the Georgia O'Keeffe Museum in Santa Fe. New York Times review of the Whitney leg of the tour (with slide show) here.