314 GEOLOGICAL PAPERS. [1881. 



a point of being present at the meeting, when he 

 contributed three Papers namely : " Some Observa- 

 tions on the Causes of Volcanic Action ; " " On the 

 Strata between the Chillesford Beds and the Lower 

 Boulder Clay : The Mundesley and Westleton Beds ; " 

 and, "On the Extension into Essex, Middlesex, and 

 other Inland Counties of the Mundesley and Westle- 

 ton Beds, in Relation to the Age of certain Hill 

 Gravels and of some of the Valleys of the South of 

 England." 



The hotel at York in which Prestwich and his wife 

 stayed held several friends besides Mr and Mrs Evans, 

 so that the meeting was remembered as one of much 

 social enjoyment. 



J. Prestwich to J. Evans. SHOEEHAM, 22nd September 1881. 



MY DEAR EVANS, I went after all to Suffolk on Tuesday, 

 calling at Harlton for Fisher. Thanks for your maps which I 

 found there. It is well you did not come, for we had a very 

 wet day. We saw, however, Culford brick pit and Warren Hill. 

 I returned last night none the worse for the trip. We found 

 nothing except a flake on Warren Hill. I am glad, however, to 

 see the position of things at Culford, and I think it is a case for 

 further inquiry. The Spottiswoodes dine with us to-morrow, 

 and possibly Lubbock. . . . 



In the Chronicle of St Edward's School, Summer- 

 town, Oxford, a letter to the Warden from Professor 

 Prestwich, dated 12th December, was inserted, giving 

 an account of the section exposed in digging the 

 foundations for the new buildings through the old 

 river gravel. The interest of this section was the 

 discovery in it of the bivalve shell Cyrena (or Corbi- 

 cula) fluminalis, now extinct in Europe, and which is 

 only found in the Nile and in some rivers of Central 



