Cambridge offered opportunities for study such as Maitland had not yet enjoyed. A little volume on Justice and Police, contributed to the English Citizen series and designed to interest the general reading public, came out in 1885, and affords good evidence of Maitland's firm grasp of the Statute book and of his easy command of historical perspective. But this book, excellent as it is, did not represent the deeper and more original side of Maitland's activity any more than an admirable series of lectures upon Constitutional History which were greatly appreciated by undergraduate audiences but never published in his lifetime. The Reader in English Law was by no means satisfied with providing excellent lectures covering the whole field of English Constitutional history, though he had much that was fresh and true to say about the Statutes of the eighteenth century and about the degree to which the theories of Blackstone were applicable to modern conditions, and though he drew a picture for his undergraduate audience which in some important respects was closer to fact than Walter Bagehot's famous sketch of the English Constitution published while Maitland was an Eton boy. Text book and Lectures were but interludes in the main operations of the campaign against the unconquered fastnesses of medieval law. First came a remarkable series of articles contributed to the _Law Quarterly Review_ upon the medieval doctrine of seisin which Maitland's sure insight had discerned to be the central feature in the land law of the Norman and Angevin period: and then in 1887 Bracton's Note Book.