"Darling Dodi, these cufflinks were the very last gift that I received from the man I loved most in the world, my father," reads a message that accompanied a gift of jewelry.
Diana's note became public during the ongoing inquest into her and Fayed's fatal car crash, which took place in a Paris traffic tunnel on Aug. 31, 1997.
As she also wrote in the note, "They are given to you as I know how much joy it would give him to know they were in such safe and special hands. Fondest love, from Diana."
In another message, Diana signs off with, "This comes with all the love in the world and as always a million heartfelt thanks for bringing such joy into this chick's life."
The letters surfaced a day after other sensational correspondence was unveiled from 1992 – the year Diana and Charles had separated.
Surprising Bond with Prince PhilipContrary to previous belief, the letters between Diana and her former father-in-law, Prince Philip, reveal a close, rather than an estranged, relationship.
Calling Philip "Dearest Pa," Diana thanks him for his guidance. In a letter that he, in turn, sent to her, Philip, now 86, vows to "always do my utmost to help you and Charles to the best of my ability, but I am quite ready to concede that I have no talents as a marriage counselor!!!"
Diana replies, "You are very modest about your marriage guidance skills and I disagree with you. This latest letter of yours shows great understanding and tact."
Friend: Diana in Love with AnotherThe inquest also heard from Diana's close friend Rosa Monckton, who on Thursday said Diana was "very much in love with" Hasnat Khan, her boyfriend before Dodi Al Fayed.
Saying Diana became "deeply upset and hurt" when the relationship with Khan ended, "She wanted to marry him," Monckton told the inquest.