ABSTRACT
Brett in fact, identified the only collection dependent on the Collectio Lanfranci, that contained in Oxford, Bodleian Library MS 561, fols 2-60, and also drew some interesting conclusions on the value of the abbreviated versions and the use that other authors have made of the Collectio. With regard to the arrival of the Pseudo-Isidorian Decretals, the results of Zachary Brooke’s investigations are well known. Their major diffusion was as a result of the transmission of a brief and peculiar copy that Archbishop Lanfranc brought from Bec: the so-called Collectio Lanfranci. Together with the Collectio Lanfranci, Brooke identified other two copies of the Pseudo-Isidorian Decretals that came to England slightly later, probably in time of Archbishop Theobald. The nine folia, which form an independent unit, cannot have been derived from any of the already known manuscripts of the Collectio Lanfranci.
