MT. 37.] TERTIARY MEMOIRS. 73 



papers ; if not, I shall be happy to offer any further explanation. 

 I should never have ventured to have submitted this to you 

 unless a gentleman who has had great experience in sewers 

 had intimated to me that he did not consider my plan more 

 impracticable than the others, and advised me to lay it before 

 the court. May I claim your kind services in taking charge 

 of these two papers, and believe me to remain. . . . 



In connection with this subject, Joseph Prestwich 

 prepared a " Geological Map of the Estuary of the 

 Thames for the Referees of the Main Drainage of the 

 Metropolis." It was printed by order of the House 

 of Commons, 4th February 1858. 



Two more memoirs were in 1849 given to the world, 

 both through the channel of the Geological Society 

 namely, one " On the Position and general Characters 

 of the Strata exhibited in the Coast Section from 

 Christchurch Harbour to Poole Harbour " ; the other 

 " On some Fossiliferous Beds overlying the Red Crag 

 at Chillesford near Orford, Suffolk," in which latter 

 he showed the existence at Chillesford of a peculiar 

 Arctic group of fossils in undisturbed beds above the 

 Red Crag. The excursion to the Crag district was 

 made in company with Godwin-Austen, Morris, and 

 Alfred Tylor. 



During the forties there had been great intellectual 

 activity, yet if we compare his published work with 

 that in the decade of years to follow, it will be seen 

 that it had not reached its maximum. 



On August 7th Prestwich had paid a visit to his 

 old friend Mr Wickham Flower l at Croydon, and 

 a week later he was at Hastings, exploring Fairlight 



1 John Wickham Flower ; born 1807, died 1873 : best known for his 

 studies of the deposits yielding palaeolithic implements near Brandon and 

 Thetford. 



