Horace Walpole turns to the letters and argues that: Walpole's numerous letters are often used as a historical resource. In one, dating from 28 January 1754, he coined the word serendipity which he said was derived from a "silly fairy tale" he had read, "The Three Princes of Serendip". The oft-quoted epigram, "This world is a comedy to those that think, a tragedy to those that feel", is from a letter of Walpole's to Anne, Countess of Ossory, on 16 August 1776. The original, fuller version appeared in a letter to Sir Horace Mann on 31 December 1769: "I have often said,
The Love for Three Oranges (fairy tale) Island of Ogresses, where two little old women each told him that he could find what he sought here, if he went on, and the third gave him three citrons, with a warning not to cut them until he came to a fountain. A fairy would fly out of each, and he had to give her water at once. He returned home, and by the fountain, he was not quick enough for the first two, but was for the third. The woman was red and white, and the prince wanted to fetch her home properly, with suitable clothing and servants.