An unearthed letter Diana, Princess of Wales wrote just two days after her wedding to King Charles in 1981 – when he was the Prince of Wales – has now been made public. The letter, which was addressed to a footman at Buckingham Palace, is one of the items in Julien’s Auctions, which is presenting a collection of items that belonged to the late princess.

The auction event is set to take place on June 26 at The Peninsula Beverly Hills. The signed note, which will be up for auction, gives an insight into how “lonely” Diana had been feeling when she was living in Buckingham Palace.

The letter, seen by People Magazine, clearly shows that it was written on July 31, 1981, and was intended for Mark Simpson, a footman at the palace.

The letter reads: “Dear Mark, I just wanted to thank you for all your kindness + patience you’ve showed towards me since I moved into B.P. My stay was made so much easier by your company as it was so terribly lonely + we had so many laughs for that I can’t thank you enough.

“Do hope you were able to enjoy Wednesday + that you liked my dress? I’m off to Britannia tomorrow, what with all those men around. I will have to keep a watchful eye on Evelyn!

“The bad news is that I haven’t eaten any cereal — sob. How am I going to cope without my bowls of cereal….[smiley face]. A large thank you for being you — Much love, Diana.”

Martin Nolan, co-founder and executive director of Julien’s Auctions, told People magazine that the letter “speaks volumes”.

He said: “This is one of my favourite pieces. It’s like a couple of days after she got married. She’d been living in Buckingham Palace as she was transitioning from being a normal person to being a royal and the future queen.

“So she had to learn from the Queen Mother and the Queen about curtsying and all that.

“But she had fun with Mark Simpson, the footman. And he was about the same age, a little bit older than her. And she talks here, it speaks of how she was lonely when she was in the palace.

“But [Simpson] cheered her up and they had fun. And she talks about the bowls of cereal that they used to have and how is she going to do without all the bowls of cereal? So that’s a really, really great piece. Because it speaks volumes.”