few Old English analogies, the system, as it appears in the 12th century, is a product peculiar to the conceptions of fiscal organization formed by Norman subtlety. Indeed, its importance lies in the manner in which the institution held together, focussing as it did on the revenues and expenditure of the kingdom. The picture presented by the Dialogue of the Exchequer (c. 1176) is that of a comprehensive system which secured the receipt of royal income by providing a thorough audit of accounts, employing processes adapted to the circumstances of the time. It is, in fact, through the description of financial institutions that it is possible to ascertain the forms of revenue held by the crown. Thus, the ingenuity expended on the Exchequer's administrative machinery had as its aim the increase of the king's resources, a subject in which all politically involved churchmen and lawyers were deeply involved. The history of the English fiscal system affords the best known example of continuous financial development in terms of both institutions and methods. Although periods of great upheaval occurred from the time of the Norman Conquest to the beginning of the 20th century, the line of connection is almost entirely unbroken. Perhaps the most revolutionary changes occurred in the 17th century as a result of the Civil War and, later, the Glorious Revolution of 1688; though even then there was no real breach of continuity. Royal and feudal prerogative In order to understand the character of English finance in the Middle Ages, it is essential to constantly bear in mind the identification of the king with the state. Although feudalism was, in one aspect, a powerful instrument for the division of political authority, the particular form in which the Conqueror introduced it to England nevertheless enabled the fiscal rights of the crown to be established more strictly than was possible under previous conditions. First, the actual property of the crown was better administered as each royal manor became subject to the new system of accounting. Secondly, the king's various claims or dues took on a more decidedly feudal character, thus receiving stricter legal definition and, thirdly, the higher judicial organizations assisted the expansion of court fees while, above all, the increased authority of the state made the casual receipts (for such they were) from trade more profitable. Sources of revenue in the High Middle Ages Broadly, the sources of revenue fall under