Overview Lucy Collier (b. 1940), a developmental psychologist, is the third child of Charles and Nina Collier and the granddaughter of John Collier, Sr., commissioner of Indian Affairs under Franklin D. Roosevelt. Charles Collier befriended O'Keeffe and Alfred Stieglitz in the 1920s in New York City and remained friends with the artist into the 1970s. Lucy Collier knew O'Keeffe when she was a child and young adult, especially encountering the artist after Charles and Nina bought Mary Cabot...