JET. 53.] GEOLOGICAL EXCUBSIONS. 197 



Shall we say twelve \ Twice twelve would be within 

 the number ! 



J. Prestwich to J. Evans. LONDON, 5th August 1865. 



MY DEAR EVANS, You must have had a delightful excursion. 

 I long to hear the details. I see Dupont has sent in a prelim- 

 inary report about the caves. I and other members of our Easter 

 party abstained from any communication on the subject until 

 Dupont and Van Beneden had made theirs. Do you know 

 when the final one will be, as I shall then have a short notice 

 to give of our visit ? I see Dupont has modified some of the 

 views he held when we saw him. Thanks for your Archaeopteryx 

 paper. As the 'Header' has taken it up, you will, I expect, 

 have a battle to fight. . . . 



A paper of general interest, evidently embodying 

 the observations on his Easter trip, was read to and 

 published by the Geological Society, entitled, " Addi- 

 tional Observations on the Raised Beach at Sangatte 

 with Reference to the Date of the English Channel, 

 and the Presence of Loess in the Cliff Section." 



The next entry in a note -book for this year is, 

 " Aldborough, 20th August 1865. By Snape Bridge 

 and Tunstall to the Oyster Inn at Butley, with J. 

 Evans and M. Gaudry, &c." 



The object of this expedition was the inspection 

 of various crag -pits in the neighbourhood, and the 

 amassing of further materials for his series of Crag 

 Memoirs. 



Weymouth and its geology engaged his attention 

 in October ; and Blackdown Hill, near Dorchester, 

 with its great beds of flint, and quartzose gravel, and 

 transported blocks, was a source of special interest. 



The last expedition for this year was apparently that 

 made "to Thetford with John Evans and Wickham 



