Can you see the white stag?
If not, I suggest you put your spectrespecs on!
The Celts saw white stags as messengers from the Otherworld. In Arthurian legend, the pursuit of the white stag represents mankind’s spiritual quest.
In ‘The Lion, the Witch and the Wardrobe’ by C.S. Lewis,
at the end of the book, it is a White Stag that guides the children (then Kings and Queens of Narnia) back to their own world.
In the Harry Potter series by J.K. Rowling, when Harry learns how to perform a Patronus charm to guard him from the Dementors, it takes the form of a White Stag.
If you read the books, you also know that Harry’s patronus to him represents his dead father, James Potter, whose animagus shape was a stag. Since James is no longer alive, he can be said to belong to “the otherworld”.
SPOILER WARNING: If you haven’t read the last book in the series yet, you might want to stop reading here.
In the last book, The Deathly Hallows, a white doe (a female deer) also appears at a crucial point in the story. She, too, turns out to be a patronus, representing Harry’s mother, Lily (also dead and hence belonging to the Otherworld). But produced by someone from whom Harry would not expect it…
Well, if you did read the last book – you know who!