“Ingeniously, [Heinrich Wickmann] was able to use a pencil to mark that bit of the egg he could see inside the hen's oviduct, through its cloaca prior to laying. (I can just imagine his wife popping into his study with… — Tim Birkhead Copy Share Image
![“Ingeniously, [Heinrich Wickmann] was able to use a pencil to mark that bit of the egg he could see inside the hen's oviduct, through its cloaca prior to laying. (I can just imagine his wife popping into his study with a cup of coffee and seeing Wickmann with his pencil up a hen's bottom: 'What are…” quote by Tim Birkhead](https://sms4smile.com/quotes/img-quotes/c49/tim-birkhead-42213_quote_ingeniously-heinrich-wickmann-was-able-t_1649686.jpg)