“His upper lip lifted, revealing long, yellowish teeth and part of the gum.” This is how the novelist, poet and essayist Gérard Bessette described laughter on the horse face of a man in 1960 in his book “The Librarian”.
This description corresponds perfectly to this drawing representing a Camargue horse whose grimace (yawn) resembles laughter.
Drawing with colored pencils on A3 sheet.