Feb 8, 2010, 12:12 GMT
Britain's Prince Charles was branded a "gruesome child" by his mother's cousin.
The future king - eldest son of Queen Elizabeth II and Prince Philip - didn't impress Princess Alexandra when he displayed a distinct lack of sympathy when he watched her have a painful blister lanced.
Alexandra wrote a letter to her brother Prince Edward in 1952, when Charles was four, during one of the royal family's stays at Balmoral in Scotland.
She told how she had been playing the parlour game "stone" when a man named Martin "bit me quite accidentally on the mouth, which was extremely painful", leading to her the blister developing.
According to the Daily Telegraph newspaper, she added: "So this morning Dr Middleton came and pierced it! Charles was fascinated and insisted on watching. Gruesome child don't you think?"
She then revealed Charles had been in bed for three days at the time as he was experiencing pain in his ear.
Alexandra - who is now 73 - is the youngest granddaughter of King George V and Queen Mary and was a bridesmaid at the queen's wedding to Philip.
The letter, which has been in a private collection for the past 25 years, will be auctioned off at the Radisson Edwardian Hotel at Heathrow on February 13, and is expected to fetch £400.
Auctioneer Richard Davie said: "It is a rare letter with good references to the Royal Family."
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