_13th century._ Aemilius Macri (Fragment). Library of Lord Clifden, Lanhydrock, Cornwall. _13th century._ Le livre de toutes herbes appele "Circa instans." Sloane 1977. British Museum. _13th century._ Le livre de toutes herbes appele "Circa instans." Sloane 3525. British Museum. Incipit [liber de simplicibus medicinis ordine alphabetico qui appellatur] "Circa Instans" Platearii. Ashmole 1428 (II). _Late 13th century._ Circa Instans. All Souls College, Oxford. _13th century._ De medicinis simplicibus sive de virtutibus Herbarum libellus. Balliol College, Oxford. _Late 13th century._ De simplicibus medicinis. Corpus Christi College, Cambridge. _13th-14th century._ Liber cogitanti michi de virtute simplicium medianarum. Trinity College, Cambridge. _13th-14th century._ Herbarium. Addit. 22636 (XIII). British Museum. _13th-15th century._ [Lines on the virtues of the scabious plant.] Addit. 33381 (XXXVIII). British Museum. _Late 13th century._ De collectione herbarum. Arundel 369 (II). British Museum. _13th century._ De Naturis Herbarum. Royal 8c IX. (X). British Museum. (From St. Mary's, Reading.) _13th century._ De virtutibus herbarum rhythmice. Sloane 146 (III). British Museum. _13th century._ Præfatiuncula in totum præsens volumen. _Inc._ In hoc continentur libri quattuor medicine Ypocrates Platonis Apoliensis urbis de diversis herbis. Ashmole 1462 (I). _Late 13th century._ Hic sunt virtutes scabiose distincte. Digby 86 (LXXXV). Bodleian. _13th (?) century._ De proprietate herbarum. Laud Latin 86 (XIII). Bodleian. _13th-14th century._ Liber qui vocatur "Circa Instans." Peterhouse College, Cambridge. _13th-14th century._ Circa instans Platearii. Trinity College, Cambridge. _13th-14th century._ Versus de Ysope (Hyssop). Harleian 524 (CLXI). British Museum. _Circ. 1300._ De herba Basilisca seu Gentiana. Harleian 2851 (XXIX). British Museum. (Written in England.) _13th century._ Beginning of a history of trees and plants which ends abruptly on page 3. Harleian 4751. British Museum. _Late 13th-14th century._ [Verses--including 19 lines on various herbs.]