Having now given a short account of the geology of the long line of coast from Yarmouth to Eastbourne, one may say of the first part of it, north of the Thames, that it is, so to speak, most favourably constructed for coast-erosion. Without a single hard or firm rock, such as the Chalk; without anything that can form a nearly perpendicular cliff of any height, no cliff indeed being high enough to give rise to a respectable landslip; composed of loose sand and gravels, loams and clays (the last partly strengthened by thin layers of soft stone), there is really nothing to withstand either the assaults of atmospheric action from above or of the sea below. Such parts as are of special interest or have been subject to special observation will now be noticed.