The Bodleian Libraries boast the world’s largest collection of original Tolkien material, and the exhibition will be further boosted by important loans, including manuscripts of The Hobbit and The Lord of the Rings.
The exhibition, titled Tolkien: Maker of Middle-earth, runs from 1 June until 28 October.
Its title Linquë súrissë is in Quenya, one of the highly developed Elvish languages that Tolkien created.
The unpublished material was released to the Guardian by the Bodleian in advance of Tolkien Reading Day on Sunday, held on 25 March each year, organised by the Tolkien Society.