Fragment on the Constitution and the Union, The Collected Works of Abraham Lincoln, ed. Roy P. Basler, volume 4, 168-169. http://quod.lib.umich.edu/l/lincoln/lincoln4?rgn=main;view=fulltext;q1=March+5%2C+1861#4_168_4
Woodrow Wilson Address to the Jefferson Club of Los Angeles, Classics of American Political and Constitutional Thought: Reconstruction to the present, (Scott J. Hammond, Kevin R. Hardwick, Howard Leslie Lubert), 323-324. books.google.com/books?id=-TiAirQlOYoC&lpg=PA323&pg=PA323#v=onepage&q&f=false
i like this... will share this with my sons as we do our Constitution Literacy course...