MAPPING. 25 



We have heard that a chalk pit may be seen by the 

 road that crosses our third slip, fig. 7, and we will com- 

 mence our survey there or thereabouts. On the way 

 and near the S. margin of the map, clear grey sand has 

 been thrown out from a hole newly-dug for a gate-post ; 

 this is very different from the sand seen in the first and 

 second slips surveyed, and we conclude, from the level 

 and general run of the country, that it can hardly pass 

 beneath the chalk. However, no other good section is 

 obtainable, and there seems no chance of getting at the 

 junction, for the soil is so deep and there are no ditches 

 worthy of the name. We can simply dot in a line where 

 the sandy soil appears to end, and so for the present leave 

 it and get on to the chalk pit. 



This is a fine excavation on the very highest point 

 in the map, and to the N". commands a view down and 

 beyond the chalk escarpment, which at once indicates 

 that the mapping of this slip will give but little trouble 

 chalk, bare chalk in rounded hills and hollow, every- 

 where is visible. Having made our notes in the pit 

 (Part II.), we descend the road which winds down the steep 

 slope, and has been cut through the higher ridges, fre- 

 quently exposing the chalk in the first part with layers 

 of flint, in the lower portion without any flints at all. 

 Here is. an exposure of sand, and where the roads meet 

 a small pond in clay the same kind of thing exactly 

 that was met with in our first and second slips and on 

 turning up the road to the left we make out a junction 

 of the beds. These are then easily traced to the margin 

 of the map, by feature in the usual way, the lower line 

 running by a pond that is shewn thereon. 



