By Pietro Lorenzetti – http://www.aiwaz.net/panopticon/lorenzetti-pietro/gc58p0, Public Domain, https://commons.wikimedia.org/w/index.php?curid=3944840
Books and other writing by author C R Taylor
By Pietro Lorenzetti – http://www.aiwaz.net/panopticon/lorenzetti-pietro/gc58p0, Public Domain, https://commons.wikimedia.org/w/index.php?curid=3944840