Book excerpt: In 1688, Charles Le Brun, a French academician, delivered a lecture on expression that was so popular it was published in sixty-three separate editions and influenced all discussion of the subject throughout Europe for over a century. This book reconstructs and translates the text of the lecture (badly garbled in all previous versions), explores the context in which it was conceived, delivered, received, and finally rejected, and reproduces the images that accompanied the lecture.