Former Household Cavalry officer Mr Hewitt, who had a five-year affair with the-then Princess of Wales between 1986 and 1991, kept 64 letters she wrote to him.
ANDREW MORTON: Unlike many of her predecessors, Queen Elizabeth has always been cool under pressure. In the 1990s, her remarkable equilibrium was tested far more than we ever knew
James Hewitt, 62, was seen out running errands in Exeter on Wednesday
The former lover of Princess Diana wore Brigade of Guards tie for his outing
He shares an apartment in a converted stately home with his elderly mother
Home is just a few miles from the cottage where he and Diana enjoyed trysts
The 62-year-old polo player was once forced to deny he was Harry s father
Ex-Calvary Officer Mr Hewitt, now 62, was seen this week dressed in khaki trousers, a smart mauve shirt and flat cap as he sat atop a lawnmower as he tended gardens near Exeter, Devon.