234 GEOLOGICAL EXCURSIONS. [1872. 



4. The coast on the other side of the Basin, and the Dunes 



beyond. 



5. Eue and Stables, and the banks of the Canche for Gravel 



beds. 



6. Samer (Lower Greensand) and some outliers of Tertiaries 



on the Chalk hills beyond. 



7. Some deep valleys among the Chalk between Boulogne and 



Pol, in which the Palaeozoic rocks show on their floor. 

 We shall get a few Drift beds on various levels, and, I hope, 

 traces of raised beaches. . We may look also for flint imple- 

 ments in the valleys of the Canche or Authie. We will talk the 

 matter over to-morrow. . . . 



Instead of the chosen Boulogne route, his friends 

 selected another district, when it is evident from the 

 annexed letter, in which the subject of this Memoir 

 drafted out a plan for their guidance, that his thoughts 

 were regretfully with them. 



J. Prestwick to J. Evans. LONDON, 29th March 1872. 



MY DEAR EVANS, Yesterday it blew a gale and rained inces- 

 santly ; to-day we have the rain without the wind. This, how- 

 ever, is a sorry consolation to me, and very sad work, I fear, for 

 you and Galton. 1 Gosselet of Lille has kindly offered to meet us 

 at Boulogne and accompany us on a proposed excursion, which I 

 still hope may come off later in the season. If the weather con- 

 tinues so bad, go to Paris and luxuriate in the museums and 

 theatres there under cover. Weather permitting, go to Beauvais, 

 where you have 



1. A valuable local museum. 



2. A magnificent fragment of a cathedral. 



3. Loess and valley Drift one mile south of the town. 



4. A fine fossiliferous exhibition of the Calcaire grossier, and 



of all the beds, in fact, between the Chalk and the Cal- 

 caire lacustre suptricur ; also the "Diluvium" of the 

 French at Chaumont, about five or six miles distant. 



Sir Douglas Galton, K.C.B., born 1822 ; died 10th March 1899. 



