The picture given of true leprosy in the medieval treatises on medicine is unmistakeable. There are two systematic writers about the year 1300 who have left a better account of it than the Arabian authors from whom they mostly copied. While the writers in question have transferred whole chapters unaltered from Avicenna, Rhazes and Theodoric, they have improved upon their models in the stock chapter ‘De Lepra.’ It so happens that those two writers, Bernard Gordonio and Gilbertus Anglicus, bear names which have been taken to indicate British nationality, and the picture of leprosy by the latter has actually been adduced as a contemporary account of the disease observed in England[134]. Gordonio was a professor at Montpellier, and his experience and scholarship are purely foreign. The circumstances of Gilbert the Englishman are not so well known; but it is tolerably certain that he was not, as often assumed, the Gilbert Langley, Gilbert de l’Aigle, or Gilbertus de Aquila, who was physician to Hubert, archbishop of Canterbury († 13 July, 1205)[135], having been a pupil at Salerno in the time of Aegidius of Corbeil (about 1180). The treatise of Gilbertus Anglicus bears internal evidence of a later century and school; it is distinguished by method and comprehensiveness, and is almost exactly on the lines of the _Lilium Medicinae_ by Gordonio, whose date at Montpellier is known with some exactness to have been from 1285 to about 1307. Future research may perhaps discover where Gilbert taught or was taught; meanwhile we may safely assume that his scholarship and system were of a foreign colour. The medical writer of that time in England was John of Gaddesden, mentioned in the end of the foregoing chapter; he is the merest plagiary, and the one or two original remarks in his chapter ‘De Lepra’ would almost justify the epithet of “fatuous” which Guy de Chauliac applied to him. Although we cannot appeal to Gilbertus Anglicus for native English experience any more than we can to his _alter ego_, Gordonio, yet we may assume that the picture of leprosy which they give might have been sketched in England as well as in Italy or in Provence. The conditions were practically uniform throughout Christendom; the true leprosy of any one part of medieval Europe is the true leprosy of the whole.