The writer from whose work the 1953 film Knights of the Round Table was adapted died in what year?
Knights of the Round Table (film):  The screenplay was by Talbot Jennings, and Noel Langley from Sir Thomas Malory's "Le Morte d'Arthur", first published in 1485 by William Caxton. Thomas Malory: Sir Thomas Malory (c. 1415-18 – 14 March 1471) was an English writer, the author or compiler of "Le Morte d'Arthur".
1471