S INTKODUC'TlON. 



Therefore being deprived of all my first la- 

 bors ill Botany, Zoology, and Mineralogy in 

 that memorable year 1815, I had to begin 

 again my researches and collections, which I 

 pursued ever since with renewed zeal, always 

 at my own sole expense. I spent 1813 and 

 1816 in the States of New York, New Jersey, 

 and Pennsylvania chiefly. In 1816 I went to 

 explore as far as Lake Champlain, Vermont, 

 and the Saranac Mountains, near the sources 

 of the Hudson River. In 1817 I went to the 

 Mattawan and Kiskanom, or Catskill Moun- 

 tains, and explored Long Island, where I dwelt 

 awhile. 



But my great travels in the West began in 

 1818, I made a tour of 2000 miles as far as the 

 Wabash River, crossing twice the Alleghany 

 Mountains on foot, and exploring Ohio, In- 

 diana, Illinois, Kentucky, &/C. Some of the 

 results of my former discoveries in that jour- 

 ney were published in 1819, in the Physical 

 Journal of Paris, in 80 new Gen. of Plants, and 

 70 New Gen. of Animals. 



Having been appointed Professor of Natural 

 Sciences in the IJniversity of Lexington, in 

 Kentucky, I went there in 1819, crossing a 

 third time the Alleghany Mountains, through 

 the Cumberland road of Maryland, still on foot, 

 as I never would cross these beautiful moun- 

 tains in any other way, in order to botanize all 

 the while, and I was rewarded by many new 

 plants. 



I spent seven years in Kentucky in 1826, 

 exploring that State thoroughly, and making 

 excursions to Ohio, &/C., my longest journeys 

 were in 1823, when I went West as far as the 

 Rivers Cumberland and Tennessee near their 



