TLS, 2 pages, 5.5 x 7, Winterbrook House letterhead, 16th March, 1972. Christie writes to Roland Miles, a young Christie enthusiast, discussing her writing habits and mentioning what would be her final novel, the then-untitled "Postern of Fate." In full: “I am glad that you read my books. As to your questions: Books take varying times to write because it depends how much time you have to give. I should say normally between 3-6 months, with possibly another month later for revision. One works different times, different days, again depending on what other things are engaging your time or attention. If you have a good 2 or 3 days on end, you could probably work 2 or 3 hours at a time, say in the morning, and I find a very good time to write is in the evening when you can easily put in 3 or 4 hours as there are not likely to be interruptions. I am planning another book at the moment, but there is no title in my mind for it as yet. ” Accompanied by the original mailing envelope and a postcard portrait of Christie. In fine condition.