Scholia are ancient commentaries, initially written in the margins of manuscripts, not necessarily at the bottom, as are their modern equivalents, the notes. The term marginalia includes them. Some are interlinear, written in very small characters. Over time the scholia were copied along with the work. When the copyist ran out of free text space, he listed them on separate pages or in separate works. Today's equivalents are the chapter notes or the notes section at the end of the book. Notes are merely a continuation of the practice of creating or copying scholia in printed works, although the incunabula, the first printed works, duplicated some scholia. The works of Homer have been heavily annotated from their written beginnings. The total number of notes on manuscripts and printed editions of the Iliad and Odyssey are for practical purposes innumerable.