Princess Diana wrote her name on the desk rubber
A desk rubber used by Princess Diana when she was at boarding school in Norfolk fetched £540 at auction.
The eraser, which has Diana's writing on it, was used by the princess when she was a nine-year-old pupil at Riddlesworth Hall near Diss.
It was part of a collection of royal memorabilia being auctioned by Reeman Dansie in Colchester, Essex.
The rubber, which Diana kept after she married Prince Charles, was expected to fetch more than £300.
Diana gave it away to her secretary, Jane Parsons.
Miss Parsons gave evidence at the trial of Michael Fagan who broke into Buckingham Palace and disturbed the Queen when she was in bed.
In the letter, dated 24 September 1982, Diana praised Miss Parsons' courage, writing: "Dear Jane, I just wanted you to know that I thought of you on Thursday at the Old Bailey.
"You are marvellous to have gone through the ordeal and well done. Yours sincerely, Diana."