In the years before the Civil War, Cyrus Flint (1804-1869) had a furniture business, Flint & Jones, at 36 Royal Street, in what is currently the French Quarter area in New Orleans, Louisiana. Flint, his wife, Catherine M. Flint (1810-1895), "a colored girl," and their two daughters, Cornelia Anna (1836-1915), and Mary Lawrence (1848-1921), settled in Brooklyn during the first half of the American Civil War. Cyrus and Catherine Flint also had two sons, Alden (1837-1872) and George C. (1840-1924). George C. Flint was an avid traveler whose destinations included various parts of the United States, London, Panama, and Mexico. Like his father, George also later engaged in the furniture manufacturing business; Geo. C. Flint & Co. thrived on Hudson and Clarkson Streets in present day Greenwich Village in New York City during the late 1800s until about 1930. Cornelia A. Flint married John G. Secor, who was involved in the dry goods business on Canal Street in New York until his death at the age of 39. Cornelia and John had two children, Cora M. and Mary Lawrence, who married brothers, Thomas and Joseph Blandford Cousins. Mary Lawrence Secor and Joseph Blandford Cousins had a daughter, Cornelia Flint Cousins (b. 1888), who was a member of the Brooklyn Junior League and who married Martin Egan, a writer, correspondent, and employee at J.P. Morgan & Co.
From the guide to the Secor, Flint, and Cousins families collection, Bulk, 1860-1899, 1840-1971, (Brooklyn Historical Society)