The correspondence provides a rare contemporary glimpse into Diana’s apparent optimism at the beginning of a marriage that would eventually collapse amid allegations of infidelity and profound personal unhappiness.
Her enthusiastic description also contrasts sharply with revelations she made years later about the tensions that overshadowed the honeymoon.
In recordings made during sessions with her voice coach, subsequently featured in a documentary, Diana recalled discovering Charles had received cufflinks bearing intertwined initials from Camilla Parker-Bowles, now Queen Camilla, 79.
Diana believed the jewelry symbolized the continuing closeness between Charles and Camilla, whose relationship would become central to the breakdown of their royal marriage.
She said: “On our honeymoon, cufflinks arrive on his wrists.”
Diana described the distinctive design and her immediate suspicions about who had given Charles the present.
She said: “Two Cs entwined like the Chanel ‘C.’ Got it. One knew exactly. So I said, ‘Camilla gave you those, didn’t she?’ He said, ‘Yes, so what’s wrong? They’re a present from a friend.’
“And boy, did we have a row. Jealousy, total jealousy. And it was such a good idea – the two Cs – but it wasn’t that clever.”