1886. ] BOTANICAL GAZETTE. 5 
Gaudichaud, Delessert, Jacques Gay and Boissier ; at Lyons, Se- 
ringe; at Montpelier, Delile and Dunal; at Vienna, Endlicher 
and Fenzl; at Munich, Martius and Zuccarini; at Geneva, the 
De Candolles and Reuter; at Halle, Schlechtendal; at Berlin, 
Klotzsch, Kunth, Link and Ehrenberg; and at Hamburg, his 
early correspondent, Lehmann. His letters to Dr. Torrey, which 
contain a complete account of his journey and doings, are still in 
existence. 
When he returned, late in 1839, he fuund matters at Michi- 
gan University still in a somewhat chaotic condition, and the 
trustees were willing to extend his furlough. Accordingly he 
Mts. in North Carolina. In January, 1842, he made his first 
visit to Boston, as the guest of B. D. Greene. While there he 
made the acquaintance of President Quincy of Harvard College, 
and in April the Fisher Professorship of Natural History was 
tendered him. This he accepted, and went to Cambridge in 
July. This position he holds to the present time. 
At Cambridge he devoted his time to the reorganization of 
the botanic garden and the necessary instruction of students, giv- 
ing whatever time he could command to continued study of the 
voluminous and important collections which poured in from all 
sides, especially from the government surveys of new territory 
and the assiduous work of individual collectors. The results of 
this study, of the highest importance, are embodied in various 
memoirs in different publications. This embarrassment of riches 
caused the suspension of the Flora of North America. 
“Manual” appeared. When the Wilkes Expedition returned, 
all its material was put into his hands. The report on these col- 
lections forms a large quarto volume with an atlas of one hund- 
red royal folio plates. It is not possible, however, to enumerate 
even the most important of his writings since 1842. They are 
scattered through the American Journal of Science (of which he 
1 Pages 185-400 were issued in the spring of 1842, and the remainder of vol. ii in Feb- 
Tuary, 1843. 
