One of the characters is a time travellerThe season one box set comes with a book dated "xx, June, 1896." It features newspaper articles centered around Emma and William's romance. This book also contains pictures dated "2004". Clearly, whoever wrote that book either is a time traveler or got the pictures from one; and that author was too conscientious a researcher to falsify the dates.
- Well, that would explain that anachronistic biplane model in Chapter 2.