billet doux (love letter)

From the Smithsonian's Archives of American Art, "More than Words" author Liza Kirwin compiles the fascinating letters of America's most famous artists. The intimate letters are accompanied with artist illustrations and sketches.

Here, Frida Kahlo's letter to a friend reveals her continued love for Diego Rivera despite his marriage to Guadalupe Marin. Two months later, Kahlo and Rivera would marry again.