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Treatise on Logic, with later additions, written chiefly in the first half of the 15th century in Italy

MS. Add. A. 6

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A school treatise on Logic, beg. 'Transcendentia sunt sex. Ens, Aliquid.' At fol. 51 is a short supplementary treatise, 'Tractatus sensus compositi & diuisi', written for Petrus de Guiditionibus. Where the MS. ends imperfect, Codrus Aretinus has supplied the defect, signing 'Finis per me Codrum Aretinum Marescottorum preceptor[em] die xxij mensis Septembris 1488.'.


  • written chiefly in the first half of the 15th century in Italy


58 Leaves

Language of Materials



MS. Add. A. 6

Other Finding Aids

Falconer Madan, et al., A summary catalogue of western manuscripts in the Bodleian Library at Oxford which have not hitherto been catalogued in the Quarto series (7 vols. in 8 [vol. II in 2 parts], Oxford, 1895-1953; reprinted, with corrections in vols. I and VII, Munich, 1980), vol. V, no. 24712.

Custodial History

On fol. 56 (which like fol. 1 is a palimpsest of no value) is 'Questa Logiccha e del pouero Codro Brentadore', who may be the Antonio Urceo, surnamed Codro, who according to the Libri Catalogue was a professor at Bologna 1480-1500. In the 17th cent. the volume was 'Codice Ixxxxvii' in the library of 'M. G.' whose arms were a plain cross.

Catalogue of the ... collection of Splendid Manuscripts ... formed by M. Guglielmo Libri 1859 no. 266*

Physical Facet

On parchment


5 7/8 × 4 1/2 in.

Repository Details

Part of the Bodleian Libraries Repository

Weston Library
Broad Street
Oxford OX1 3BG United Kingdom