Diaries of Mildred Cox Howes of Brookline and Chestnut Hill, 1896-1973, include fourteen line-a-day diaries kept 1 Jan. 1905- 6 May 1973; diaries kept as a child in 1899 and 1902; travel diaries for 1902, 1908, 1910-15, 1947, and 1949; and yachting diaries for the summers of 1901-03. Entries include accounts of daily life, including time spent with family members such as her father William Emerson Cox, her mother Josephine Nickerson Cox, her husband Osborne "Howsie" Howes, her sister-in-law Edith Perkins Cox, her daughter Pricilla Howes Nickerson, and her governess Laura A. Young (know as Val); visits with friends; social engagements and events; and time spent sailing. Travel accounts include; camping trips, fishing, and hunting trips in Maine, Montana, and Canada; time spent aboard the yacht Santanta in the Florida Keys and the Inland Waterway; and sea voyages to England, France, Egypt, Greece, and Turkey, among others. Also includes personal business papers of her husband Osborne Howes, 1896-1902; notes, newspaper clippings, and autobiographical information written by Cox; genealogical information of the Cox and Howes families, and various lists such as books that her daughter Pricilla Howes Richard's read during childhood.