Nine letters written by Princess Diana during her early marriage to Prince Charles, reflecting on their honeymoon and motherhood, are up for auction and expected to fetch up to £20,000. The correspondence includes Diana's positive description of their honeymoon as a 'tremendous success' despite later revelations of conflicts, particularly regarding cufflinks from Camilla Parker-Bowles. The letters showcase Diana's initial joy in motherhood after Prince William's birth and reveal her personal emotions and interactions with her family's former housekeeper. This auction sheds light on Diana's early marital life and provides insight into her feelings and experiences during that period.