To the westward of Dover (between it and Folkestone) a great amount of climbing on grass and crumbly chalk slopes can be obtained; almost every gully and face can be ascended from the sea, or the S.E. Railway, to the top. It is desirable to remember that in dry weather the grass and the earth which underlies it is of the consistency of sand, and great care is requisite; after rain the grass is of course slippery; but the underlying material adheres more firmly to the cliff. It is unnecessary to add that a slip on any of these slopes would almost certainly prove fatal. On the face of _Abbot's Cliff_, and to the westward (about halfway between Dover and Folkestone), some traverses may be effected at a height of 200 ft. or more above the base; they do not, however, compare for climbing with the traverses on the other side of Dover. As one goes westwards, the angle of the cliffs becomes less, and from _Abbot's Cliff_ towards Folkestone it is rarely necessary to use one's hands, though very nice 'balance' is essential, as the results of a slip would usually be serious. Above the _Warren_, still nearer Folkestone, the slopes become easy, and after heavy snow afford excellent _glissades_. The cliffs between Dover and St. Margaret's vary from 200 to 350 ft., whilst those between Dover and Folkestone vary from 250 to 500 ft. in height. In Sussex the chalk is well developed at and near _Beachy Head_, where it attains a height of some 600 ft. Just west of this come several miles of cliffs, lower indeed (about 300 ft.), but amazingly vertical. About _Flamborough Head_, in Yorkshire, this formation attains fine proportions, while as far west as Devonshire _Beer Head_ is upwards of 400 ft. high. =Chimney=: a recess among rocks resembling the interior of a chimney open on one side. (See _Back-and-knee_.) =Chockstone=: a northern word for a stone wedged between the sides of a gully. A short word for this is greatly needed, and I would suggest that it might be called a 'chock,' simply. =Clapham=, a station on the Midland Railway, is an excellent centre for _Ingleborough_ and the _Potholes_. =Clark's Leap=, near _Swirl's Gap_ on Thirlmere, is a jutting rock, so called from a suicide which took place there over 100 years ago. It is one of many local absurdities of the novel called 'The Shadow of a Crime' that this name is brought in as an antiquity in the eyes of characters supposed to be living two centuries ago.