In 1878, General Pitt Rivers excavated the motte and bailey castle on the downs behind Folkestone and published the results with characteristic promptness and accuracy. Today, over three-quarters of a century later, only four excavations, all in the past ten years, have advanced our knowledge further. While these have solved many problems, they have posed others, for few mottes are adequately documented (Old Aberystwyth is an honourable exception) and the dating of results can only be approximate.