^ET. 77-78.] NOTE-BOOKS AND MAPS. 351 



made. All I cannot hope to give, but I have told Whitaker, if 

 they can be of any use to him in future editions of maps or 

 memoirs, they are quite at his service as soon as I have put 

 them in a little order. 1 Many of those are at present merely 

 in the form of rough notes, intelligible only to myself. The 

 delay in bringing them out has been a loss and vexation to me. 

 With my wife's and my best Xmas and New Year's wishes to 

 you and yours, I am, sincerely yours, JOSEPH PRESTWICH. 



J. Prestwich to J. Evans. DARENT-HULME, IQtk April 1890. 



MY DEAR EVANS, I regret deeply the loss of my old friend 

 Hubert. . . . Paris will not seem to me the same without him. 

 It must have been about the year 1836 that we first became 

 known to one another, and I never passed through Paris without 

 seeing him. At first we had many differences, and his vigorous, 

 hearty, and good-tempered discussions were a great pleasure to 

 me. His robust frame led me to hope that his would have been 

 a longer life. 



J. Prestwich to G. Plarr. 



DARENT-HULME, SHOREHAM, SEVENOAKS, 6th June 1890. 



MY DEAR GUSTAVE, Many thanks for the copy of your 

 papers, though I regret to say they are sealed books to me. 

 Pebbles of white quartz are originally derived from veins in 

 the nietamorphic rocks by marine action. They may occur in 

 any formation, and are common in many. A few are found in 

 the Lower Greensand ; many in the Millstone Grit. Those in 

 the Westleton Beds may come from the rocks of Ardennes, or 

 from some of the sedimentary rocks of Belgium. The Westleton 

 pebbles are rarely larger than a marble. 



Mrs Prestwich joins me in kind regards to Mme. Plarr; and 

 I am, yours sincerely, JOSEPH PRESTWICH. 



With the advent of summer several short visits were 



1 The notes and papers here referred to, as well as many field-maps, have 

 now been presented to the Geological Survey Office in Jermyn Street, 

 London. 



