 The lines of red ink connect the date glyphs to the locations the Mexica arrive at.Erasures present in the codex on folios 8 to 11 show that the "tlacuilo" first tried to connect places and dates by connecting the date of arrival to the location and then to the date of arrival at the next destination.Instead, he used footprints in black ink to carry the Mexica from one destination to the next.