A 9th century manuscript of the fables of Phaedrus was only discovered in France towards the end of the 16th century. This was published in 1596 by Pierre Pithou as "Fabularum Aesopiarum libri quinque" and was followed by two more editions before century’s end. Near the beginning of the 18th century, a manuscript of the 15th-century bishop Niccolò Perotti was discovered at Parma containing sixty-four fables of Phaedrus, of which some thirty were previously unknown. These new fables were first published in 1808, and their versions were afterwards superseded by the discovery of a much better preserved manuscript of Perotti in the Vatican Library, published in 1831. Scholars realised that Phaedrus’ work had also served as the basis for Mediaeval fable collections that went by the name of Romulus and at the start of the 20th century the Swedish scholar Carl Magnus Zander (1845–1923) reconstructed 30 additional fables from their prose recensions there.