(en) Edgar Warner Clark, History and Genealogy of Samuel Clark, Sr., and His Descendants from 1636-1897--261 Years, Nixon-Jones Print Company, , 31-37 (lire en ligne)
(en) Jack Buckman, Unraveling The Threads: The Life, Death and Resurrection of the Singer Sewing Machine Company, America's First Multi-National Corporation, Dog Ear Publishing, , 12–14 p. (ISBN9781457546617, lire en ligne)
(en) « The Singer Estate; Contest Over the Will of the Late Isaac M. Singer a Millionaire of Numerous Wives and Many Children. an Important Decision to Special Partners. the Late Hon. James Brooks' Estate. », The New York Times, (lire en ligne, consulté le ).
(en) « FUNERAL OF MRS. POTTER.; Bishop Greet Officiates at Services for the Widow of the Late Bishop. », The New York Times, (lire en ligne [PDF], consulté le ).
