In the office they are using Royal Albert old Country Rose,this was not for sale till 1904.
When saying goodbye to Murdoch, Wells implies that the events have inspired him to write a story very much like The Island of Doctor Moreau, but Wells published that novel in 1896, a year earlier.
The song "The Honeysukle and the Bee" is heard in this episode that takes place in the late 1890, but the song was not composed until 1901.