Which 1964 book by J.R.R. Tolkien included the story Leaf by Niggle?

Tree and Leaf is the 1964 book by J.R.R. Tolkien that included Leaf by Niggle.

The volume brought together the short story Leaf by Niggle and Tolkien’s essay On Fairy-Stories, along with related material in some editions. Leaf by Niggle follows an artist whose detailed painting of a tree becomes an imaginative meditation on work, duty, death, and creation.

On Fairy-Stories explains Tolkien’s ideas about fantasy, including recovery, escape, and consolation. The pairing makes Tree and Leaf especially important for readers who want Tolkien’s reflections on storytelling alongside a fictional example.

The book is often confused with later collections of Tolkien’s essays and short fiction. Smith of Wootton Major was published separately in 1967, while The Monsters and the Critics is a later scholarly collection.