Errata on the Special London Map. 



Some errors and omissions in colouring were unfortunately 

 introduced on the one-inch map, in four sheets, colour-printed 

 in 1903. They are as follows : 



Sheet 1. A small tract of Plateau Gravel should have been indicated 

 at Elstree village. 



Sheet 2. North-east of Aveley, in the south-eastern corner of the 

 map, areas coloured Woolwich and Reading Beds on the north-east of 

 Belhus Park, and north of the high-road west of Somers Heath, should 

 be London Clay. 



At Hornchurch Station, south of the village, the small tract coloured 

 as Valley Gravel should be London Clay. 



Sheet 3. Areas coloured as Woolwich and Reading Beds, except on 

 the borders of the Thanet Sands and Chalk at Ewell and Sutton, should 

 be London Clay. 



Sheet 4. In the tract north of Eltham and south of Eltham Common, 

 the symbol i 2 should be i 3 . 



The Alluvium should have been coloured to the eastern stream along 

 t he valley between Darenth and the Powder Mills south of Dartf ord. 



At Crohamhurst the red stipple has been omitted from the outlier 

 of Blackheath Beds, which is therefore wrongly shown as Woolwich Beds. 



The whole area shown on the four sheets is covered by the 

 New Series colour-printed one-inch maps, Sheets 255, 256, 257, 

 269, 270 and 271 ; the sheets whose numbers are given in italics 

 are already published and the remainder will be issued shortly. 

 Instances where newer information or more detailed survey has 

 led to modifications in the mapping are noted in the text of 

 this memoir. 



x 17412 



