In contrast, a "good quarto" is considered to be a text that is authorised and which may have been printed from the author's manuscript (or a working draft thereof, known as his foul papers), or from a scribal copy or prompt copy derived from the manuscript or foul papers.Duthie, George Ian. "Introduction; the good and bad quartos". The Bad Quarto of Hamlet. CUP Archive (1941). pp. 5-9
