Previously unseen letters written by late Princess Diana of Wales to a family friend will soon go up for auction at Cornwall, England. According to reports, the rare collection of artefacts includes 39 letters and Christmas cards, dating between the years 1990 and 1997, until her tragic death. The handwritten rarities by Princess Diana are addressed to her family friend Roger Bramble, and apparently include moving details about her life post-divorce from Prince Charles and an alleged attempt of suicide.