The lines of text scrawled across the walls of the maze are taken from the original Alice books. They include excerpts from The Walrus and The Carpenter poem and the White Knight's song, and the A Boat Beneath a Sunny Sky poem which closes Through the Looking Glass and What Alice Found There.
As well as the White Rabbit, the Tiger Lily and the Lory are also original characters from the Alice books. The Lory's repeated assertion that it knows more than Alice because it is older, is directly borrowed from the caucus race scene.
In reality, the first movie adaptation was filmed in 1903, with an 8 minute running time, and starred May Clark as Alice. It was shot mostly outdoors in Britain, and although portions are missing, it has survived relatively intact to this day. It is now in the public domain, and sections of it are featured in the Night Journeys book trailer.
The title of the story is taken from a 2007 album by The Birthday Massacre, which also features a song called Looking Glass.
The cover artwork of Night Journeys features an adaptation of an original illustration by Sir John Tenniel. It appears in chapter one of Alice's Adventures in Wonderland.
The setting of The Harbingers had several major influences. These included many Grimms' fairy tales, the illustrations of Arthur Rackham, and the music video for The Howling by Within Temptation.
The story is inspired greatly by Daphne du Maurier's novel Rebecca. The relationship between the sisters Imogene and Clementine is a parallel to that of Mrs de Winter and Rebecca de Winter, as the living is constantly haunted by the memories of the deceased 'other woman'. The girls' mother is also a nod to the housekeeper Mrs Danvers, who holds an unhealthy obsession with Rebecca - just as the mother does with Clementine.
The two sisters are each represented by a bird: Imogene by a dove and Clementine by a crow.
Jacob Cray is named after the main character from Chris Wooding's novel The Haunting of Alaizabel Cray.
Anna Rackham is named after the famous artist Arthur Rackham, whose works often featured intricate foliage details.
Anna's alarming condition, and the concealment of her in a separate part of the house, was inspired by the character of Bertha Mason in Charlotte Bronte's Jane Eyre. In this book, Bertha is the 'madwoman in the attic', who is present in the lives of everyone at Thornfield Hall even if they don't realise it.
Caslowe Hall and its neighbouring village are inspired by a real place: Denna Hall and Burton village in Cheshire, England. Like Caslowe, Burton is also surrounded by a salt marsh.
The story is set just after the end of the Second World War. This accounts for tape being present on some windows as a protection from bomb blasts, and Martha's death during an air raid. Due to his profession as a farmer, Jacob would have been exempt from military service.
Caslowe Hall's attic is based upon the mansion attic from Edward Scissorhands, which also has a large hole in the roof.