The keep of Rochester Castle, so picturesquely situated on the Medway, was not a mere fortress without domestic convenience. Here we still look upon the remains of sculptured columns and arches. We see where there were spacious fireplaces in the walls, and how each of four floors was served with water by a well. The third story contains the most ornamental portions of the building. In the _Domesday_ enumeration of castles, we have repeated mention of houses destroyed and lands wasted, for their erection. At Cambridge twenty-seven houses are recorded to have been thus demolished. This was the fortress to overawe the fen districts. At Lincoln a hundred and sixty-six mansions were destroyed, "on account of the castle." In the ruins of all these castles we may trace their general plan. There were an outer court, an inner court, and a keep. Round the whole area was a wall, with parapets and loopholes. The entrance was defended by an outwork or barbacan. The prodigious strength of the keep is the most remarkable characteristic of these fortresses; and thus many of these towers remain, stripped of every interior fitting by time, but as untouched in their solid construction as the mounts upon which they stand. We ascend the steep steps which lead to the ruined keep of Carisbrook, with all our historical associations directed to the confinement of Charles I in this castle. But this fortress was registered in _Domesday Book_. Five centuries and a half had elapsed between William I and James I. The Norman keep was out of harmony with the principles of the seventeenth century, as much as the feudal prerogatives to which Charles unhappily clung. We have thus enumerated some of the more prominent statistics of this ancient survey, which are truly as much matter of history as the events of this beginning of the Norman period. There is one more feature of this _Domesday Book_ which we cannot pass over. The number of parish churches in England in the eleventh century will, in some degree, furnish an indication of the amount of religious instruction. By some most extraordinary exaggeration, the number of these churches has been stated to be above forty-five thousand. In _Domesday_ the number enumerated is a little above seventeen hundred. No doubt this enumeration is extremely imperfect. Very nearly half of all the churches put down are found in Lincolnshire, Norfolk, and Suffolk. The _Register_, in some cases, gives the amount of land with which the church was endowed. Bosham, in Sussex, the estate of Harold, had, in the time of King Edward, a hundred and twelve hides of land. At the date of the survey it had sixty-five hides. This was an enormous endowment. Some churches had five acres only; some fifty; some a hundred. Some are without land altogether. But, whether the endowment be large or small, here is the evidence of a church planted upon the same foundation as the monarchy, that of territorial possessions.