158 GEOLOGICAL EXCURSIONS. [i860. 



number of these geological journeys is simply bewilder- 

 ing, especially as debatable points were visited over 

 and over again. 1 



A letter from Sir Charles Lyell 2 to the Rev. W. S. 

 Symonds, dated October 1, 1860, contains a reference 

 to Prestwich's work : 



My idea of going to South Wales, and taking your district on 

 my way, and getting the benefit of your co-operation, was depen- 

 dent on some progress having first been made by Prestwich, Fal- 

 coner, and Colonel Wood in regard to the age of the South Wales 

 caves, with not only Elephas primigenius, Rhinoceros ticliorhinus, 

 but also some of them with the other elephants and rhinoceroses 

 (E. antiquus and R. leptorhinus, now called by Falconer R. 

 hemitcechus), the age of these relatively to the glaciers, glaciation, 

 and submergence of Northern Wales, and the deposition of the 

 northern Drift. 



Again, on October 2nd, a geological excursion is 

 reported to Hertford, when sections of a new cutting 

 at Hatfield, with those of gravel-pits at various points, 

 at Collier's End and near Puckeridge, are given. 



The following letter is addressed to Dr Falconer, who 

 was about to spend the winter on the Riviera : 



J. Prestwich to H. Falconer. 10 KENT TERRACE, Uth Oct. 1860. 



MY DEAR FALCONER, I am very sorry I missed you on the 

 last two occasions I called at Sackville Street. However, you 

 can have no difficulty about Amiens. The pits are near at hand 

 and easily accessible. I hope M. Pinsard may be at Amiens to 

 show you the collections. The one you should first see is not the 

 town collection near the Hotel de Ville, but a small collection in 



1 An account of some of these journeys is given in "Memoranda, chiefly 

 on the Drift Deposits in various parts of England and Wales : being 

 Extracts from the Note-books and other MSS. of the late Sir Joseph 

 Prestwich," printed in the Geological Magazine, Decade iv. vol. v. pp. 

 404-417, 1898. 



2 Life and Letters of Sir Charles Lyell, vol. ii. p. 358. 



