COLCHESTER, Essex.--The remarkable keep of this castle has been the subject of antiquarian legend for many centuries, and Mr Clark has the merit of having proved its early Norman origin, by its plan and architecture. A charter of Henry I. is preserved in the cartulary of St John's Abbey at Colchester, which grants to Eudes the Dapifer "the city of Colchester, and the tower and the castle, and all the fortifications of the castle, just as my father had them and my brother and myself."[369] This proves that the keep and castle were in existence in the Conqueror's time; the Norman character of the architecture proves that the keep was not in existence earlier. We see, then, that the reason there is no motte at Colchester is that there was a stone keep built when first the castle was founded. As far as we are aware, Colchester, the Tower of London, and the recently discovered keep of Pevensey are the only certain instances of stone keeps of the 11th century in England. That one of the most important of the Conqueror's castles, second only to the Tower of London, and actually exceeding it in the area it covers, should be found in Colchester, is not surprising, because the Eastern counties at the time of the Conquest were not only the wealthiest part of the kingdom (as Domesday Book clearly shows[370]), but they also needed special protection from the attacks of Scandinavian enemies. Mr Round has conjectured that the castle was built at the time of the invasion of St Cnut, between 1080 and 1085.[371]