Website alert: At his instructional website Sight-Size, artist Darren Rousar has posted an article, Carolus-Duran's Methods, that provides historical context, a good summary of the topic, many illustrations, and a video. Duran's methods are well known, but it's good to see a demonstration. Furthermore, this self-portrait was new to me because it is privately owned. It was auctioned in 2018 by Bonham's, a reminder that galleries are a good source of images.