CHAPTEE XI 



1857-1858 



THROUGHOUT this period his health was greatly tried 

 by the strain of his work and life in town. Head- 

 ache ! headache ! is his repeated note in the early 

 part of 1857, and in 1858 we find such entries as : 

 "Feb. 11. Used up. Hypochondriacal and be- 

 devilled." " Ditto 12." " 13. Not good for much." 

 "21. Toothache, incapable all day." And again : 

 "March 30. Voiceless." "31. Missed lecture." 

 And, "April 1. Unable to go out." He would 

 come in thoroughly used up after lecturing twice 

 on the same day, as frequently happened, and lie 

 wearily on one sofa; while his wife, whose health 

 was wretched, matched him on the other. Yet he 

 would go down to a lecture feeling utterly unable to 

 deliver it, and, once started, would carry it through 

 successfully at what cost of nervous energy was 

 known only to those two at home. 



But there was another branch of work, that for 

 the Geological Survey, which occasionally took him 

 out of London, and the open-air occupation and 

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