When I went to an Aspen seminar on "American Scriptures" - the bicentennial of the Declaration and they discussed the preamble and the Gettysburg Address and much more, but not Lincoln's Second Inauguration, I challenged that omission and they said find something on it and to my astonishment, at that time, there was no book or long article that really did it. So I wrote one that attempted to do it justice. Although obscurely published, that essay got a nice bounce. Somehow David Donald saw it, and in his notes to his biography singled it out.