Those perilous climbings [with her sister Claudia, in the Palo Duro Canyon, 1916] were frightening, but it was wonderful to me and not like anything I had known before. The fright of the day was still with me in the night and I would often dream that the foot of my bed rose straight up into the air — then just as it was to fall I would wake up. Many drawings came from days like that, and later some oil paintings.

About climbing the Palo Duro Canyon, 1916 - Some Memories of Drawings (1976)