Wilson, Douglas L., ed; Davis, Rodney O., ed. 'Register of Informants' in 'Herndon's Informants: Letters, Interviews, and Statements About Abraham Lincoln' . Urbana: University of Illinois Press, 1998. [format: book], [genre: history]. Permission: University of Illinois Press
Persistent link to this document: http://lincoln.lib.niu.edu/file.php?file=herndon737.html

A native of Kentucky, Isaac Cogdal was a farmer and stone mason who operated a quarry in Menard County and provided material for many buildings in the region. An active Whig and later Republican, Cogdal eventually was admitted to the Illinois bar in 1860, having been encouraged in the law by his old New Salem friend, AL. (Onstot; HEI/Sangamon)