The covers of MSS.20491-20493 consist of fragments of twelfth-century manuscript of St. Augustine, 'De civitate Dei': MS.20492 has the top half of a folio containing book 12, chapters 17-20; MS.20493 has the top half of the next folio containing book 12, chapters 20(2)-23; two folios are then missing; and MS.20491 has the whole of the next folio, folded in half, containing book 13, chapters 7-11 (parchment; ruling in ink; 2 columns; 45 lines; 380 x 235 millimetres, text area 318 x 190 millimetres, 17 millimetres between columns). These three volumes also have as inner covers leaves from printed books, and in MS.20494 such a leaf is the only cover; that in MS.20491 is the lower half of a leaf from a religious text; those of MSS.20492-20494 are respectively a leaf, the lower half of a leaf, and a leaf (174) from a legal text in two columns with surrounding gloss; both books date from the fifteenth or beginning of the sixteenth century.
