Subseries consists of correspondence to Clare Harrington by various family members, between 1883 and 1966, including a letter from her Grandpa, Grandma and Aunt Eva Dawson, written from Paris in 1883; letters from Bernard James Harrington, 1884, between 1894 and 1898, 1902, 1903; Rankine Dawson, 1889; Anna Dawson Harrington, 1893, 1896, 1901, 1902, 1904, 1905, 1907; Lois Sybil Harrington, 1898; Conrad Dawson Harrington, 1903; Ruth Mina Harrington, 1906; Bernard Gibb Harrington, 1907, 1952; Jessie Soults, 1918; William Bell Dawson, 1935, 1938; Walter Vaughan, 1917; W. Shepherd, 1917; Kate Alexander, 1917; Edward P. Featherstonhaugh, 1917; Mary Sutherland, 1917; Lois McMurtry, 1917; Sarah B. Grier, 1917; Ethel Hurlbatt, 1917; Sophie Campbell, 1917; Rachel Skelton, 1917; Grace Fairley, 1917; Ethel H. Porter, 1917; E.V. Hancock, 1917; Phyllis Davis, 1952 and several undated letters from Rankine Dawson; Anna Dawson Harrington; Muriel Galt; Alice J. Turnham, with an attached list of material related to George M. Dawson, 1952, and Conrad Featherstonhaugh Harrington, 1966. It also includes photographs of Cristall Margaret Dawson, 1925 and her correspondence, 1939 and 1964; 4 letters to Conrad Harrington, written by his mother, Anna Dawson Harrington, between 1894 and 1914; 4 letters to Bernard Gibb Harrington, written by Lois Sybil Harrington in 1900; 2 newspaper clippings, 1923 and 1933 and 1 undated clipping about Harrington Air Service; 6 letters written to Eric Harrington from John William Dawson, 1883; Rankine Dawson, 1884; Bernard James Harrington, 1885; Ruth Mina Harrington, 1894 and Louisa G.F. Molson, 1894; numerous letters to William Harrington, between 1899 and 1916 and in 1927 from Anna Dawson Harrington, 1899, 1903, 1905, 1907, 1908, 1909, 1910, 1915, 1916; Bernard James Harrington, 1903, 1906; R.H. Coats, 1927 and 10 undated letters from Anna Dawson Harrington. It also includes letters from Clare Harrington to Phyllis Davis, 1952; letters from Bernard James Harrington to Edith Harrington, 1888; 28 letters from Anna Dawson Harrington to Ruth Harrington, between 1894 and 1912; 1 letter from Bernard James Harrington to Ruth Harrington, 1906; 1 letter to Miss Gibb from Brooklyn (New York, N.Y.), 1883; miscellaneous letters written and received by members of the Dawson-Harrington families, between 1892 and 1910, e. g. from Grandpapa William Dawson addressed to children; from Anna Harrington addressed to her daughters; from Bernard James Harrington, Clare Harrington, Lois Harrington addressed to family; 2 letters from Charlotte Harrington to Mary Louisa Harrington, between 1872 and 1873; 6 unidentified letters, between 1861 and 1884 and photocopies of receipts, deeds of gift, notes, and correspondence related to the donation of archival materials to McGill University, given by the Dawson family, between 1908 and 1963.