2992 THE CORRESPONDENCE OF SCHWEINITZ AND TORREY 
in America and Europe; author of books on the flora of Chester 
County, and on economic plants; editor and publisher of the 
letters of Bartram, Marshall, and Baldwin. 
Davis, Emerson (1798-1866). Graduate of Williams College (1821); 
trustee of the same institution from 1833, and vice-president from 
1859. Engaged in educational work until 1836, he was a clergy- 
man at Westfield, Massachusetts, for the remainder of his life. 
In youth he was interested in geology and botany, and devoted 
particular attention to the study of the genus Carex. 
DeKay, James Ellsworth (1792-1851). New York physician; early 
member of the Lyceum of Natural History; zoologist to the 
State Survey, and author of the zoological volumes of the Natural 
History of New York. 
Delile, Alire Raffeneau (1778-1850). French physician; when only 
twenty years of age he was one of the scientists chosen to accom- 
pany the Napoleonic expedition to Egypt, and was placed in 
charge of the botanic garden then established at Cairo. From 
1803 to 1805 he was French vice-consul at Wilmington, N. C., 
and then studied medicine in New York City, receiving his M.D. 
degree from Columbia College in 1807, and returning to France 
in the same year. The last thirty years of his life he was pro- 
fessor at the university of Montpellier and director of the botanic 
garden there. He is best known for his elaborate works on the 
flora of Egypt (1810-24). 
Denke, Christian Frederick (1775-1838). Moravian clergyman; born 
at Bethlehem, Pa.; educated at Nazareth Hall, and teacher there 
1796-1800; missionary to the Indians of Canada, at Fairfield, 
in western Ontario, 1800-18; at home in Bethlehem, 1818-20; 
pastor at Hope, North Carolina, 1820-22, and at Friedberg, N. C., 
1822-31; retired in 1831, spending the rest of his life at Salem, 
N. C., where he died. He was associated botanically with Muh- 
lenberg as well as with Schweinitz. 
Dewey, Chester (1784-1867). American educator; professor at 
Williams College and the University of Rochester; specialist in 
the genus Carex. 
Douglass, David Bates (1790-1849). United States military engineer; 
graduate of Yale; professor at West Point throughout the period 
of Torrey’s connection with the military academy; afterward 
professor at New York University, Kenyon College, and Hobart 
College. He accompanied the Cass expedition to the upper ` 
