MT. 77.] WESTLETON BEDS. 349 



I regard it as one of the great privileges to which my profes- 

 sion has admitted me, that I have had the opportunity of minis- 

 tering, even in small degree, to the health and comfort of one 

 whose life and work have secured for him universal and deep 

 respect. With renewed thanks, yours faithfully, 



AND. CLARK. 



The age of the plateau implements constantly occu- 

 pied the attention of Prestwich. 



J. Prestwich to B. Harrison. DARENT-HULME, 21st Sept. [1889 or '90]. 



DEAR SIR, There is still some doubt about the relative posi- 

 tion of the Drift, of chert fragments, flints, and implements, to 

 the " Eed Clay with Flints." There is some reason to suppose 

 the former is the older. On the other hand, I have never seen 

 such a Drift under the Eed Clay. It may be that the clay wraps 

 round, but generally it seems to pass under ; or do the imple- 

 ments, &c., belong to the Eed Clay ? To assist this point I want 

 an excavation at Bower Lane. The Lenham Beds are certainly 

 under the Eed Clay. . . . 



Although not published until the following year, 

 Parts I. and II. of the memoir on the " Westleton 

 Beds" were read to the Geological Society in 1889. 

 Their title was, " On the Relation of the Westleton 

 Beds, or Pebbly Sands of Suffolk, to those of Norfolk, 

 and on their Extension inland ; with some Observa- 

 tions on the Period of the Final Elevation and Denuda- 

 tion of the Weald and of the Thames Valley, &c." It 

 was acknowledged that no one was so well fitted as 

 Prestwich to deal with the question of the correlation 

 of the Drifts of the eastern counties with those of 

 the Thames Basin and southern counties ; and it was 

 admitted that no strata furnish problems more diffi- 

 cult of solution. Part III. of the memoir, which em- 

 braced a very wide range, was read in February 1890, 



