640 TRAVEL IN EUROPE AND AMERICA. [1873, 
Then, six weeks or more ago, died my next oldest 
friend and companion, Sullivant, making a sad spring 
and giving me a needed warning to make haste. He 
again leaves two unfinished works which I must see 
to, though Lesquereux will, I trust, edit them. Of 
one, indeed, he was to be joint author. The other, 
a second volume of the beautiful “ Ieones Muscorum,” 
is ready as to the plates, but not at all so, I learn, for 
the letterpress. 
For myself, as I think I have already told you, this 
summer completing thirty-one years of professorial 
work in the university, I am relieved from further 
duties of instruction, — and of my salary. I shall not 
experience the full relief until the very close of sum- 
mer. For, in the interest of this department of the 
university, and to leave it in proper working condi- 
tion, I have undertaken a course of what we call 
university lectures, — meaning lectures intended the 
rather for others than members of the university, — 
and have opened the botanical laboratory to pupils, 
mainly teachers in schools, for the summer.! Consid- 
erable time must be given to them, but, after a few 
weeks, I hope to throw it mainly upon my assistant, 
Professor Goodale. 
Professor Goodale, under appointment as assistant 
professor of vegetable physiology, will take the whole 
work of instruction in botany off my hands; but if a 
former assistant and pupil, Dr. Farlow, now with De 
Bary, proves capable of it, as I hope, he will, I trust, 
take up the work in systematic botany. His fancy, 
however, is for Cryptogamia. 
Mr. Sereno Watson is the only one here to do work 
in systematic botany, but he will not teach. He and 
1 This was the beginning of summer schools in Harvard University. 
