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The Tractatus de herbis, reproduced here, is one of the many rare and precious manuscripts in the collections of the British Library. It is an illustrated herbal which comes from a collection of pharmacological texts written in southern Italy around AD 1300AD, which is now known as British Library Egerton MS 747. probably the original, manuscript of the Tractatus de herbis, a type of herbal which was to become one of the most influential texts on medicinal plants between the 14th and 16th centuries. It contains a vast corpus of information about plants and their medicinal uses, inherited from Greek, Roman and Arabic sources, and combines this with paintings of plants which, in their observation of nature, anticipate for the first time modern botanical illustration. since Antiquity, the artist actually looked at the plants and drew them from life wherever possible. The paintings may seem rather stiff and two dimensional to us today, but at the time they were amazingly innovative. Even in panel and wall paintings there is nothing comparable. origin is not recorded, there is no trace of who the owners were and no contemporary documents mention it. However close examination of its physical characteristics (size, binding, quality of parchment) and contents (layout, style of writing, illumination) suggest it closely resembles a number of manuscripts made in southern Italy around Palermo and Naples, and illustrated by the artist Jacobellus of Salerno.