INTRODUCTION. xxxi 



small cost) and to measure off on them from the lithographic map all distances multiplied 

 four times. In this way, by measuring from the parish church, of any place, the site of 

 which is shown by a cross, or from any bend of a stream, a greater approach to accuracy 

 will be obtained, as well as the advantage of the contour surface furnished by the Ordnance 

 sheet. The names of a few places (Norwich among them), where the shading is close and 

 intricate, have been omitted, or they would have obscured the Geology. As, however, 

 the site of the churches of all these is shown by the crosses, they can be readily identi- 

 fied on the Ordnance sheet. Wherever the lines of section traverse pits affording sections 

 which exhibit the beds clearly, they are indicated by indentations in the surface line, 

 and their position is written over them. Thorpe and Sizewell Cliff is run down and 

 grassed. From Section T, northward to Lowestoft, the cliff is much obscured by talus, 

 but traces of a boss of the pebbles, No. 6, appear at one part. From Lowestoft to near 

 the southern end of Section U, the cliff is obscured by being buried in blown sand. The 

 cliff by Caistor, Orraesby, Scratby, and Winterton, is similarly obscured, but in places, 

 at the top, No. 9 is exposed. None of these portions of the East Anglian Cliff are, 

 therefore, represented in the sections, but the map shows of what the uppermost part of 

 those portions of the cliff consists. Many names of places have been wrongly spelt by 

 the lithographer in the map, but they can easily be recognised. 



