She began writing it in August 1766 and stopped making regular additions in January 1791, when Anne's husband died. The published edition includes entries only up to December 1774. (Her great-great-great-nephew James Archibald Home edited this edition.) After 1791, Lady Mary continued to pass on her opinions to friends and relatives, such as her niece Lady Frances Scott (her sister Caroline's daughter by her first marriage to Francis, earl of Dalkeith) and her first cousin once removed Lady Louisa Stuart. Louisa Stuart in 1827 wrote an acerbic memoir of Lady Mary, which is another major source for her life.