London, England (CNN) -- More than 30 letters and cards written by the late Princess Diana were up for auction Saturday in London, revealing personal details such as how she liked to open presents early and that she had trouble coping with media attention. Most of the correspondence was to Diana's personal beautician, Janet Filderman, but the auction also includes notes to her chauffeur, Steve Davies, and Christmas cards with family portraits sent while she was still married to Prince Charles. "Of course I opened your present!" Diana writes in a letter to Filderman on June 28, 1985 -- three days before the princess's birthday. "I have never been able to keep a parcel until the big day & I am not going to start at 24!!"
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Newly auctioned letters offer fresh insight into Princess Diana's life
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Most of letters for sale were correspondence with her beautician
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Auctioneers say some letters could fetch up to £1,500
"I rushed home to open your @placeholder present, which I thought was quite good considering the 25th is actually two weeks away!!"