whom the is addressed. A recent critical edition of the Latin text of the includes it, but as , by an unknown hand. Cassiodorus mentions sixteen books of Columella, which has led to the suggestion that formed part of a work in four volumes. Sources In addition to Cato the Elder and Varro, Columella used many sources that are no longer extant and for which he is one of the few references. These include works by Aulus Cornelius Celsus, the Carthaginian writer Mago, Tremellius Scrofa, and many Greek sources. His uncle Marcus Columella, "a clever man and an exceptional farmer" (VII.2.30), had conducted experiments in sheep breeding, crossing colourful wild rams, introduced from Africa for gladiatorial games, with domestic sheep, and may have influenced his nephew's interests. Columella owned farms in Italy; he refers specifically to estates at Ardea, Carseoli, and Alba, and speaks repeatedly of his own practical experience in agriculture. Principal early editions The earliest editions of Columella group his works with those on agriculture of Cato the Elder, Varro and Palladius. Some modern library catalogues follow Brunet in listing these under "" or "". [Rome: Printer of Silius Italicus, ] (book X only) Georgius Merula, Franciscus Colucia (eds.) Opera et impensa Nicolai Ienson: Venetiis, 1472. Lucii Iunii Moderati Columellae de Cultu hortorum Liber .xi. quem .Pub. Virgilius .M. i[n] Georgicis Posteris edendum dimisit. [Padova]: D[ominicus] S[iliprandus], [ca. 1480] Opera Agricolationum: Columellæ: Varronis: Catonisque: nec non Palladii: cū excriptionibus .D. Philippi Beroaldi: & commentariis quæ in aliis impressionibus non extāt. Impensis Benedicti hectoris: Bonon., xiii. calen. octob. [19 Sept.], 1494 Beroaldo, Filippo "il vecchio" Oratio de felicitate habita in enarratione Georgicon Virgilii et Columellae Bononiae: per Ioannemantonium De Benedictis, 1507 Lucii Junii moderati Columell[ae] de cultu hortorum carme[n] : Necno[n] [et] Palladius de arboru[m] insitione una cu[m] Nicolai Barptholomaei Lochensis hortulo. Parisiis: Venundantur parisiis in aedibus Radulphi Laliseau [printed by Jean Marchant], [1512] (poetry sections only) Columella, Lucius Iunius Moderatus Columella De cultu ortorum. Interprete Pio Bononiensi. Impressum Bononiae: a Hieronymo de Benedictis bibliopola et calcographo, 1520 mense Augusto Libri De Re Rustica...Additis Nuper Commentariis Iunii Pompo. Fortunati in Librum De Cultu Hortorum, Cum Adnotationibus Philippi Beroaldi... Florence: Filippo Giunta, 1521 De re rustica libri XII. Euisdem de Arboris liber, separatus ab aliis. Lyon, Sébastien Gryphe, 1541 Columella, Lucius Iunius Moderatus De l'agricoltura libri XII. / Lutio Giunio Moderato Columella. Trattato de gli alberi, tradotto nuouamente di latino