Matai Shang: We do not cause the destruction of a world, Captain Carter. We simply manage it. Feed off it, if you like.
When Edgar Rice Burroughs receives the diary from John Carter's attorney on the table, he grabs the book and turns it around to have the book's spine on this left hand. However, when the attorney stands up and shakes Edgar's hand to say goodbye, the book appears with the spine to his right.