Thirdly, we can trace an equally sharp line of demarcation between the shaded and the non-shaded area in the south-west, running from the Bristol to the English Channel, across Somerset and Dorset. South-west of this line there is no shaded patch--_i.e._, there is no case of common field enclosed by Act of Parliament. Fourthly, on the north-west side of the shaded belt, towards Wales and Scotland, there is no sharp line of demarcation between the shaded and the non-shaded area, but as one travels further and further from the central axis of the shaded area to the north-west, the shaded patches become sparser and sparser; but still some shaded patches are to be found in every English county on this side of the shaded belt, except Lancashire. Fifthly, it is to be noticed that along the central axis of the shaded belt the vertical shading--indicating enclosure by Act of Parliament in the eighteenth century--greatly predominates, and most of all the shading is overwhelmingly vertical in the very centre of the shaded area. Dotted and black patches, indicating Parliamentary enclosure in the nineteenth century, and particularly black, indicating the latest group of Parliamentary enclosures, show more prominently in the edges or fringes of the coloured area. In other words, when the great movement of Parliamentary Enclosure began in the eighteenth century, its chief field was the very centre of the district over which it ultimately spread. It is obvious that there must be certain broad historical reasons for these striking facts. The map, in fact, presents to us a series of definite puzzles for solution. 1. How and when was the south-eastern corner of England enclosed? 2. How and when was the south-western corner enclosed? 3. How and when was the great district in the north-west, in which Parliamentary enclosure is the exception, enclosed? 4. How and when were the numerous parishes within what we may call the Parliamentary Enclosure belt, which escaped Parliamentary enclosure, enclosed? And lastly, there is the question which sums these up, and presents the problem on the other side-- 5. Why were special Acts of Parliament necessary for the enclosure of some three thousand of the English parishes, in the geographical position indicated by the map? And it is important that it should be clearly understood that this is the more natural way of putting the question, because the surprising fact is not that the common field system should gradually and quietly disappear in parish A, but that it should persist in parish B, until ended by the very expensive and troublesome measure of a special Act of Parliament.