A pair of items is offered, which includes a handwritten lengthy criticism by Tolkien, and a related paperback novel, Swords & Sorcery, by L. Sprague de Camp, signed by Tolkien.  

The paperback book, with a notation, penned by Tolkien on the inside front cover: 'J.R.R. Tolkien from L. Sprague de Camp July 1962'  
The more significant item, is a sheet of stationary from the Hotel Miramar, East Overcliff, Bournemouth.  
On the verso, Tolkien has written in pencil, and overwritten the latter part in ink, a lengthy criticism of a story by Lord Dunsany, originally published in 1912 and entitled:  "Distressing Tale of Thangobrind the Jeweler", which is included in the book.  

A not very complementary critique, but a wonderful example of his cryptic handwriting.  
A fantastic pair of items, written or signed by the author of The Hobbit and The Lord of the Rings.  

Digital photo's available, inquire if interested.  
Other Tolkien books available, include both the UK and US editions, original cloth bindings, custom fine bindings, and Signed/Numbered/Limited Editions.