A letter from Princess Diana , penned 47 years ago, has surfaced for sale, offering a glimpse into her youthful ambition to become a professional dancer. Written at the age of 17, the letter saw the future royal confiding in a friend about her aspirations. "I am off to find a place to dance," she wrote in the correspondence dated 1 February 1979, adding: "I have always wanted to and hope one day to get somewhere." The letter came a year before she began dating Prince Charles, a relationship that would ultimately lead to royal duties taking precedence. However, Diana's love for dance endured, famously culminating in her iconic dance with John Travolta at the White House in 1985. The letter itself was a thank you note to Mildred Lacy, who had sent well wishes to Diana's father, John Spencer , 8th Earl Spencer, following a stroke. Diana thanks her friend for her well wishes following Earl Spencer's stroke (ChiswickAuctions/BNPS) Diana wrote: “Thank you so much for writing to Daddy.…