Frances Elisa De Forest and her brother John S. De Forest were fraternal twins. In the 1850 Chatham, Morris Co., NJ census, they were living with the Baxter & Elizabeth Sayre family. Their mother Charlotte, who died in 1856 of TB, had given birth to them while in her late 30's. By 1860, they had moved back home with their father Reuben, aunt Julia De Forest (widow of Daniel), and brother Walter. I don't know where Frances was in 1870 when she would have been about 22, but on 26 Aug. 1871 she married James J. Dunn in Chatham, then in 1880 they were living in Chatham. She was listed as "Fannie DeForest" on her marriage record.

Emma Frances Dunn, who might have been their eldest child was born in 1874. Although Frances came from a Presbyterian family, she may have converted to Catholicism for this marriage.

NEW JERSEY DEATH INDEX
Name: Frances E Dunn
Birth Date: abt 1847
Birth Place: United States
Death Date: 24 May 1894
Death Place: Hanover, Morris, New Jersey
Death Age: 47 years
Marital Status: Married
Gender: Female
Father Birth Place: United States
Mother Birth Place: United States

The 1900 census for Morristown, Morris Co., NJ shows a son Walter Francis Dunn b. March 1880. He was also in the 1905 Morris Co., NJ census, but by 1910 appeared to have married and moved to Port Charles Ward 4, Westchester Co., NY for the 1910 census. The last time I found him was his 1917-1918 WWI draft card where he was listed as Francis Walter Dunn b. 3 March 1880. He was working as a mill hand in a paper mill and living in Washington Co., No. 2, NY. His nearest relative was listed as Margaret E. Dunn who appears to have been his wife. The 1910 census had Margaret b. 1875 NY.

There was also a son John (P. or T. or S.) Dunn, who according to the New Jersey Birth records was born 28 July 1882 in Cha., Morris Co., NJ as John T. Dunn. In the 1905 Morris Co., NJ census John was living at home and working as a gardener.