The Lord Of The Rings, Behind The Scenes

Writing
Persuaded by his publishers, he started "a new Hobbit" in December 1937. After several false starts, the story of the One Ring emerged. The idea for the first chapter ("A Long-Expected Party") arrived fully formed, although the reasons behind Bilbo's disappearance, the significance of the Ring, and the title The Lord of the Rings did not arrive until the spring of 1938. Originally, he planned to write a story in which Bilbo had used up all his treasure and was looking for another adventure to gain more; however, he remembered the Ring and its powers and decided to write about that instead.
Writing was slow, due to Tolkien having a full-time academic position, and needing to earn further money as a university examiner. Tolkien abandoned The Lord of the Rings during most of 1943 and only re-started it in April 1944, as a serial for his son Christopher Tolkien, who was sent chapters as they were written while he was serving in South Africa with the Royal Air Force. Tolkien made another concerted effort in 1946, and showed the manuscript to his publishers in 1947. The story was effectively finished the next year, but Tolkien did not complete the revision of earlier parts of the work until 1949.