The Corporation of London has an extensive collection of medieval records which can be used to trace the development of the City, and provide much information of all aspects of civic life - social, economic, political, ecclesiastical, legal and military. H. T. Riley (1816-78) spent many years editing and translating some of the most significant documents, and thereby establishing his scholarly reputation. Volume 2 of this three-volume work, published in two parts in 1860, contains previously unpublished parts of the Liber Custumarum, a miscellaneous collection of documents and charters relating to London, and of Cottonian MS Claudius D.II, which was originally part of the Liber Custumarum. At a later date, other material relating to the City was also added. The documents are mostly in Latin, with parts in French; glossaries of Latin, Anglo-Norman, Anglo-Saxon, and early English words and an index are supplied at the end of Part 2.