The present series, therefore, appeals directly to that craving for clearer facts which has been bred in these times of storm and stress. No care can save us altogether from error; but, for our own sake and the public's, we have elected to adopt a safeguard dictated by ordinary business commonsense. Whatever errors of fact are pointed out by reviewers or correspondents shall be publicly corrected with the least possible delay. After a year of publication, all copies shall be provided with such an erratum-slip without waiting for the chance of a second edition; and each fresh volume in this series shall contain a full list of the errata noted in its immediate predecessor. After the lapse of a year from the first publication of any volume, and at any time during the ensuing twelve months, any possessor of that volume who will send a stamped and addressed envelope to the Cambridge University Press, Fetter Lane, Fleet Street, London, E.C. 4, shall receive, in due course, a free copy of the _errata_ in that volume. Thus, with the help of our critics, we may reasonably hope to put forward these monographs as roughly representing the most accurate information obtainable under present conditions. Our facts being thus secured, the reader will judge our inferences on their own merits; and something will have been done to dissipate that cloud of suspicion which hangs over too many important chapters in the social and religious history of the Middle Ages.
The monastic ideal and the development of the monastic rule and orders have been studied in many admirable books. The purpose of the present work is not to describe and analyse once again that ideal, but to give a general picture of English nunnery life during a definite period, the three centuries before the Dissolution. It is derived entirely from pre-Reformation sources, and the tainted evidence of Henry VIII's commissioners has not been used; nor has the story of the suppression of the English nunneries been told. The nunneries dealt with are drawn from all the monastic orders, except the Gilbertine order, which has been omitted, both because it differed from others in containing double houses of men and women and because it has already been the subject of an excellent monograph by Miss Rose Graham.