
          Princeton 5 May 1855


 Dear Dr Torrey


 My last Chemical
 lecture is over _ the last of this
 course, & so far as I can see
 of my life. Well it has been
 my best course for the lecture
 you heard was far worse than
 any other I ever have delivered
 in Princeton.


 I am now clear of a class
 that I was thoroughly afraid of
 for some time and a little uneasy
 about to the last. I am
 very tired, for I had a deal of
 work to do to pick up the
 matter for my last two lectures.


 I am afraid Dr Geo Maclean
 will call on you on Monday before
 you get this for he undertakes
        