 The codex has 24 alphabetical Nahuatl glosses of a faded sepia-colored ink, added after its manufacture.Analyzing and translating the still legible glosses, scholar Patrick Johansson Keraudren found them to be place names or short phrases of a 16th century quality.The sheets of amate were glued together sheet-by-sheet on the obverse, with reinforcing strips along the fold-lines on the back.