London ? An executor of Princess Diana’s will was unaware of the existence of a letter detailing her wish that her jewelry go to her sons after her death, a court heard Wednesday.

The letter, which was produced by prosecutors at the trial of royal butler Paul Burrell, said Diana wanted three-quarters of the value of her $31.5 million estate to go to her sons and one-quarter to her 17 godchildren.

Written on a separate page from her full will, the letter added that she wanted her sons, Princes William and Harry, to have all her jewelry so their wives could “in due course” have use of it.

But the Bishop of London, the Right Rev. Richard Chartres, who was appointed an independent executor of Diana’s will shortly after her death, said he had no knowledge of those wishes.

Under cross-examination, Chartres said he did not know that Diana’s sister, Lady Sarah McCorquodale, and mother, Frances Shand Kydd, joint executors of the will, had been shredding Diana’s documents.

The Old Bailey criminal court also was told that Lady Sarah spent two weeks destroying some of Diana’s correspondence.

Chartres, the first nonpolice witness to give evidence at Burrell’s trial, also said he had no recollection of being told by Burrell that the butler was retaining property in trust for William and Harry.

Burrell has pleaded innocent to three charges related to the theft of hundreds of items from the princess and other members of the royal family.

Burrell, 44, is accused of taking more than 300 items between Jan. 1, 1997 and June 30, 1998. Diana was killed in a car crash in Paris on Aug. 31, 1997.

The former butler maintains the items were given to him by the princess for safekeeping.