Scattered throughout the text of the Almanac were a series of marked letters. Each of these letters had a tiny, nearly invisible "notch" cut into its outline. I’d first noticed these notches the year after Halliday died. I was reading my hard copy of the Almanac at the time, and so at first I thought the notches were nothing but tiny printing imperfections, perhaps due to the paper or the ancient printer I’d used to print out the Almanac . But when I checked the electronic version of the book available on Halliday’s website, I found the same notches on the exact same letters. And if you zoomed in on one of those letters, the notches stood out as plain as day.