Harriet Leonard Hale, scion of an old and venerable New England family, was the third child and only daughter of Russell Hale. Hale was born 22 July, 1799, in Glastonbury, Hartford County, Connecticut, and died 13 April, 1849, in that same place. Harriet’s mother, Harriet Ely, was born 17 April, 1803, in Agawam, Massachusetts, and died 2 September, 1880. Russell was the son of Thomas Hale of Glastonbury (10 June, 1768–12 Feb., 1819) and Lucretia House (1771–24 September, 1835). The Hales descended from Samuel Hale, born 1 July, 1615, at Watton-at-Stone, Hertfordshire, England, who came to Connecticut as a young man, married Mary Smith in about 1642, and died in Glastonbury on 9 November, 1693.
Harriet Hale was born 14 April, 1833, in Glastonbury. Her two older brothers were Robert Ely (1827–1847) and Henry Russell (1830–1876). The 1850 Census of Glastonbury included Harriet Ely Hale as a widow, together with her daughter Harriet and her son Henry, a farmer. It is the only census that Harriet Hale Fox appeared on, as the one compiled a decade previously, when she was seven in 1840, listed the names of household heads only.
At age 18, Harriet wed blond, bearded, and bespectacled Henry Fox, a man twelve years her senior, on 5 October, 1851. He had been born in East Hartford, Hartford County, Connecticut, 19 April, 1821, and was the son of Leonard Fox (1792–1866) and Hannah Nicholson (1795–1894). The Fox family had been in New England since emigrating from London in the 17th century. Members of the clan participated in the Revolutionary War, and Leonard Fox fought in the War of 1812.