where can I find an authentic interview with Abe Lincoln?

Answer 1

Try searching the two links below. Don't know how lucky you'll be, though. The first is to Cornell's online scans of the pages of "The War of the Rebellion: a Compilation of the Official Records of the Union and Confederate Armies," a series of publications of offical records from the war. Try entering a boolean search for Lincoln and interview. The second is again scans, this time from Harper's Weekly's coverage of the war. Again, try searching for Licoln and interview.

Answer 2

http://www.toledofamily.com/Genealogical_Archives/LincolnJosiahMeeting.html