This series of monographs has been planned to supply visitors to the great English Cathedrals with accurate and well illustrated guide books at a popular price. The aim of each writer has been to produce a work compiled with sufficient knowledge and scholarship to be of value to the student of archæology and history, and yet not too technical in language for the use of an ordinary visitor or tourist. To specify all the authorities which have been made use of in each case would be difficult and tedious in this place. But amongst the general sources of information which have been almost invariably found.