Victorian Romance Emma/WMG

One of the characters is a time traveller
The 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.