Founded On Fact

https://www.theguardian.com/uk/2006/aug/28/topstories3.books

It is, at first glance, a tantalising insight into the love life of one of the nation's most celebrated poets. The letter from Sir John Betjeman to his mistress must have seemed almost too good to be true when it fell into the lap of AN Wilson, the late poet laureate's biographer. It was so convincing that Wilson included it in his new book about Betjeman as evidence of a hitherto unknown "fling".
But it was indeed too good to be true. It now seems Wilson was the victim of an elaborate hoax. The poet, who was born 100 years ago today, never penned the note.

The telltale sign that the letter is a joke is that the capital letters at the start of each sentence spell out "A N Wilson is a *beep* A journalist drew the biographer's attention to the coded message last week, and after rereading the letter he admitted that it was a hoax. "Of course I saw the funny side - I laughed about it a lot when I found out," Wilson told the Guardian yesterday. "It is quite childish of somebody and I have absolutely no interest in who wrote it."