1 868 IMPERFECT HEALTH 299 



the opposition to his lake theory : ' All the objections 

 make no impression on me, and I feel it best to leave 

 them alone as far as I am concerned. But I still hope 

 and intend to apply the view to all time past, pre- 

 sent, and future and a good deal beyond at both 

 ends. 



' You will see a lot of curious papers in the volume 

 which I will send to-morrow. I stayed at Bonn two 

 months. I have given Zirkel of Bonn a letter of 

 introduction to you. 1 He is going to the Western 

 Isles. He is a fine young fellow, and a Professor at 

 Lemberg ; he would like, too, to see some work. . . . 

 You must take old Hibbert on the Eifel if you go 

 there. Van Dechen's big map of the Drachenfels 

 region is not very good ; there is an explanation of it 

 in German. Also, the Government geological maps 

 of all the Prussian Rhine region are published. I can 

 lend you some. Be sure you see the Miocene coal at 

 Brill, half-way between Bonn and Cologne. I'll give 

 you letters if you like. Go and see the Moselle and 

 its tributaries the best case of valleys cut in a table- 

 land that I know. You must march through the Eifel 

 6s. per day, living like les cogues qui se combattent! 



LEEDS, iWi September 1868. 



MY DEAR GEIKIE Late, late, so late ; but I will 

 venture now to reply to yours of the 4th, which work, 

 laziness, and sometimes imperfect health, and conse- 

 quent demi-semi-depression, prevented my sooner 

 replying to. Not that I am ill, and yet I am just 

 something or other. It may be that it is only Age 

 with creeping claw that has claught me in his clutch. 



1 See ante, p. 262. 



