Synopsis 
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An artist, named Niggle, lives in a society that does not much value art. Working only to please himself, he paints a canvas of a great Tree, in the middle of a Forest, with many other trees around as well. He invests each and every leaf of his tree with obsessive attention to detail, making every leaf uniquely beautiful (of course, he niggles over each one!). Niggle ends up discarding all his other artworks, or tacks them onto the main canvas, which becomes a single vast embodiment of his vision.
However, many mundane chores and duties prevent Niggle from giving his work the attention it deserves, so it remains incomplete and is not fully realized.
At the back of his head, Niggle knows that he has a great trip looming, and he must pack and prepare his bags.
Also, Niggle's next door neighbor, a gardener named Parish, is the sort of neighbor who always drops by whining about the help he needs with this and that. Moreover, Parish is lame of foot and has a sick wife, and honestly needs help — Niggle, having a good heart, takes time out to help.
In addition, Niggle has other pressing work duties that require his attention. Then Niggle himself catches a chill doing errands for Parish in the rain.
Eventually, Niggle is forced to take his trip, and cannot get out of it. He has not prepared, and as a result ends up in a kind of institution in which he must perform menial labor each day.
Eventually he is paroled from the institution, and he is sent to a place in the country to work as a gardener in a forest. But he discovers that the forest is in fact the Tree and Forest of his great painting, now long abandoned and all but destroyed (except for the one perfect leaf of the title which is placed in the local museum) in the home to which he cannot return — but the Tree here and now in this place is the true realization of his vision, not the flawed and incomplete form of his painting.
Niggle is reunited with his old neighbor, Parish, who now proves his worth as a gardener, and together they make the Tree and Forest even more beautiful. Finally, Niggle journeys farther and deeper into the Forest, and beyond into the great mountains that he only faintly glimpsed in his painting.
Allegory Edit
"Leaf by Niggle" has been interpreted as an allegory to life, death, purgatory, and Heaven: Niggle is not prepared for his unavoidable trip, as humans often are not prepared for death. His time in the institution and subsequent discovery of his Tree represent purgatory followed by paradise. The story also gives insight to Tolkien's religious philosophy of Creation and sub-creation: "true creation" is the exclusive province of God, and those who aspire and create things only make "echoes" (good) or "mockeries" (evil) of the truth - while "sub-creation" of work that echo the true creations of God is a way for mortals to honor him.
Translations around the world Edit
| Foreign Language | Translated name |
|---|---|
| Afrikaans | Blad deur Niggle |
| Albanian | Fletë nga Niggle |
| Arabic | ورقة نبات بواسطة نيععلي |
| Azerbaijani | Niggle tərəfindən yarpaq |
| Basque | Niggle-ren hostoa |
| Catalan | Fulla de Niggle |
| Croatian | List po Niggle |
| Czech | List od Nimrala |
| Danish | Nørkles blad |
| Dutch | Blad van Klein |
| Esperanto | Folio per Niggle |
| Finnish | Niukun lehti |
| French | Feuille, de Niggle |
| Galician | Folla por Niggle |
| Georgian | ნიგლის ფოთოლი |
| German | Blatt von Tüftler |
| Gujarati | નિગ્ગલ દ્વારા પર્ણ |
| Haitian Creole | Fèy pa Niggle |
| Hebrew | עלה לפי ןיגגלי |
| Hindi | णिग्ग्ले द्वारा पत्ता |
| Hmong | Nplooj ntoos los ntawm Niggle |
| Icelandic | Lauf af Niggle |
| Irish Gaelic | Duilleog ag Niggle |
| Japanese | ニグルの木の葉 |
| Javanese | Godhong kanthi Niggle |
| Kurdish | Pel bi destê Niggle (Kurmanji Kurdish) |
| Latin | Folium a Niggle |
| Latvian | Lapas ar Niggle |
| Lithuanian | Lapo iš Niggle |
| Luxembourgish | Blat vum Niggle |
| Macedonian Cyrillic | Лист од Ниггле |
| Manx | Duillag er Niggle |
| Marathi | निग्गल करून लीफ |
| Nepalese | पत्ता द्वारा निगले |
| Norwegian | Blad av Niggle |
| Old English | Lēaf to Niggle |
| Pashto | پاڼه د نیګګلې |
| Persian | برگ توسط نیگگله |
| Polish | Liść, dzieło Niggle'a |
| Portuguese | Folha por Niggle |
| Romanian | Frunză de Niggle |
| Russian | Лист кисти Ниггля |
| Slovak | List podľa Niggle |
| Slovenian | List z Niggle |
| Somalian | Caleen by Niggle |
| Spanish | Hoja, de Niggle |
| Sundanese | Daun ku Niggle |
| Swahili | Jani na Niggle |
| Swedish | Blad av Niggle |
| Turkish | Niggle tarafından yaprak |
| Vietnamese | Lá của Niggle |
| Western Mari | Нигглын ӹлӹмӓшӹжӹ |
| Yiddish | בלאט דורך ניגגלע |
