“Edward Charles Pickering’s Harem 13 May 1913” by Unknown – Harvard-Smithsonian Center for Astrophysics. Licensed under Public Domain via Wikimedia Commons – http://commons.wikimedia.org/wiki/File:Edward_Charles_Pickering%27s_Harem_13_May_1913.jpg#/media/File:Edward_Charles_Pickering%27s_Harem_13_May_1913.jpg