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Clesse, G., How to Evaluate the Impact of Arabic Sources in 13th-century Latin Encyclopedias.
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Ninitte, F., La tradition arabo-musulmane dans le "Speculum Historiale" et dans sa traduction française par Jean de Vignay.
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Villarroel Fernández, I., De enciclopedia a florilegio: la transmisión de los libros V y VI del "Speculum doctrinale" de Vicente de Beauvais.
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Tugwell, S., Soundings in Exeter College MS 15 and the evolution of Vincent of Beauvais's Speculum Naturale.
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Speculum Maius

manuscript Heidelberg, Universit├Ątsbibliothek, Cod. Sal. IX.41 vol. 1

Speculum Historiale (Dijon version), Vincent┬┤s dedicatory letter to king Louis IX, from manuscript Heidelberg, Universitätsbibliothek, Cod. Sal. IX.41 vol. 1, fol. 2r

An overview of the genesis of the Speculum Maius

Between 1240 and 1260, Vincent of Beauvais compiled the enormous Speculum Maius. The genesis of this encyclopedic work was complicated. This short presentation of its genesis departs from the analysis that Eva Albrecht published in her Ph.D. De ontstaansgeschiedenis en de compilatie van het "Speculum Naturale" van Vincent van Beauvais († 1264), Louvain 2007, vol. 1, notably pp. 60-64.

In 1244 Vincent had completed a collection of articles on virtues and vices, chronological history and natural history. He then started to expand and reorganize the text drastically, which resulted into a bipartite Speculum Maius. It contained

Vincent sent a first copy of the first half of the Speculum Historiale to King Louis IX of France in autumn 1245 [first half (= 15 books) of the Dijon version; for this version the siglum Ha is used]. Vincent then revised this first half of the Speculum Historiale and together with the second half of the Speculum Historiale [Klosterneuburg version; siglum: Hb] and the entire Speculum Naturale [Tournai version, siglum: Na], this bipartite Speculum Maius came into circulation, not before autumn/winter 1245/1246.

Apparently Vincent was dissatisfied with his work and took both specula out of circulation. He separated the material on the arts and sciences from the Speculum Naturale and accommodated it into a new speculum, the Speculum Doctrinale in 18 books [siglum: Do], which is uncompleted. He profoundly revised the remaining material of the Speculum Naturale as well as the second half of the Speculum Historiale.

Before 1250, a revised version of the first half of the Speculum Historiale came into circulation [first half (= 15 books) of the Vienna version; siglum: Hc]. In its General Prologue (Libellus Apologeticus), Vincent announced his plan to create a quadripartite Speculum Maius in three volumes, including a Speculum Naturale, a Speculum Doctrinale plus a Speculum Morale (on virtues and vices), and a Speculum Historiale.

A thorough revision of the entire Speculum Historiale came into circulation after March 1253. Vincent had the massive florilegium strongly reduced but now incorporated long stretches of texts from new historical sources [Saint-Jacques version, 32 books; siglum: Hd]. The Libellus Apologeticus now describes a quadripartite Speculum Maius in four volumes, allowing both the Speculum Doctrinale and the Speculum Morale a volume of its own. Smaller revisions of the historical material resulted into the final version of the Speculum Historiale [Douai version, 32 books; siglum He]. Its exemplar came into circulation after July 1254.

The revision of the Speculum Naturale took much longer. Not before autumn 1257, a new version of the Speculum Naturale came into circulation [Bruges version, 32 books; siglum Nb]. Smaller revisions that Vincent incorporated afterwards resulted into the final version of the Speculum Naturale [Douai version, 33 books; siglum Nc]. It is unclear when its exemplar came into circulation.

Although at a few places in the earliest version of the Speculum Maius textual material has been identified that was intended for incorporation into the Speculum Morale, it is unclear if Vincent has been able to materialize his plans for that speculum. The Speculum Morale that we know today and that has been ascribed to Vincent, is the product of a Franciscan compiler who worked between 1310 and 1320 [siglum: Mo].