208 MEMOIRS ON THE CRAG. [1868-69. 



J. Prestwich to the Same. [February 1868.] 



MY DEAR COLCHESTER, Mr J. Gwyn- Jeffreys and I have 

 decided to leave town (Water Commission permitting) on the 

 evening of Monday the 10th. We shall go to Wickham Station, 

 and next day make a round of the Orford district. We shall get 

 to Woodbridge at night, and pass Wednesday at Sutton, return- 

 ing in the evening to see Mr Wliincopp's collection. Thursday 

 we shall pass at Bawdsey Cliff. 



Join us if you can and if agreeable. As I may want to tres- 

 pass at Sutton, can you oblige me with a line to anybody there ? 

 Will you allow me also to dig a hole or holes in your ground ? 

 We shall leave on Thursday evening. In haste, I am, very truly 

 yours, Jos. PRESTWICH. 



The first two of his memoirs on the Crag were 

 published this year in abstract by the Geological 

 Society, the full text not appearing until 1871. He 

 also wrote a Report for the Metropolitan Board of 

 Works, "On Boring Operations at Crossness." 



The preparation of the water -maps did not alto- 

 gether absorb his leisure, since early in May we read 

 of his being again at Walton-on-Naze, working on 

 sections doubtless with a view to the completion of 

 the third of the series of Crag memoirs. The same 

 object led him to Saxmundham, where, in Mr E. 

 Cavell's collection, he noted " one beautiful tooth of 

 Mastodon with Coralline Crag in hollows." Numerous 

 Crag localities were explored. 



During Easter, Prestwich was again at Amiens and 

 St Acheul, examining the pits to ascertain whether any 

 new features had been disclosed. Before returning to 

 England he made a list of shells in M. de Vibraye's 

 collection from Pontlevois. 



In early summer he was geologising with his friend 

 Evans in the neighbourhood of Nash Mills, the inter- 



