Why "four score and seven years ago"?

Jonathan Hennessey and Aaron McConnell have a Slate article about their graphic novel of the Gettysburg Address:

Tuesday marks the 150th anniversary of Lincoln’s Gettysburg Address. In this excerpt from The Gettysburg Address: A Graphic Adaptation, out now from William Morrow, we explore the speech’s first six words.

Rico says he's not a huge fan of comix made from history, but this is pretty good...