TO 



THE REV. ADAM SEDGWICK, F.R.S., V.P.G.S. 



WOODWARDIAN PROFESSOR, CAMBRIDGE, ETC. 



To you, my dear Sedgwick, a large portion of whose life has been 

 devoted to the arduous study of the older British rocks, I dedicate this 

 work. 



Having explored with you many a tract, both at home and abroad, 

 I beg you to accept this offering as a memorial of friendship, and of the 

 high sense I entertain of the value of your labours. 



Yours ?nost sincerely, 



RODERICK IMPEY MURCHISON. 



