philosoverted:

“Tolkien was so “wedded” to his lunar chronology that he sometimes reached impasses in his work. In an April 26, 1944 letter to his son, Tolkien said he had “struggled with a recalcitrant passage in ‘The Ring’,” and then went on to say that “at this point I require to know how much later the moon gets up each night when nearing full, and how to stew a rabbit.” (TTT).”

— http://www.physics.ccsu.edu/larsen/astronomy_of_middle.htm
(via crocordile)