400 CORRESPONDENCE. [1853, 
1 am afraid to touch Gregg’s Mexican plants, for 
fear of the time they would consume. In “ Exploring 
Expedition,” I branch out little or none, except a few 
notes in Malvacez, and probably more in Composite. 
lf I could do the work abroad, I could work up 
collateral things most advantageously ; but the means 
here at disposal are too poor. 
Still, you will be pleased with my volume i. when I 
finish and send it to you (the letterpress this fall !). 
No specimens scarcely of Cactacee in collection 
Exploring Expedition, —a drawing or two. I shal 
send them on to you presently. . 
I grieve to tell you that Adrien ae Jussieu is dead. 
Cancer in the stomach, his tedious malady proves to 
have been. It makes a deep impression on the sci- 
entific men, and the public, too, in Paris. He was 
much my most intimate correspondent in France, a 
true friend, and a charming man. 
You know, perhaps, that Moquin-Tandon has suc- 
ceeded the late Achille Richard at L’EKeole de Méde- 
cine. Tulasne, I suppose, will be the new professor 
at the Jardin des Plantes; at least he ought to be, 
as he is the most able man. 
No farther news since my last. 
Agassiz looks poorly and says he is not well... . 
I never could get Fouquiera up. To-day I have 
sown some seeds, and put on my own table, by the 
window, to watch. ... 
18th August. 
Agassiz handed me your note about the Compass 
plant. I took him at once into the Garden, to see Sil- 
phium laciniatum, terebinthinaceum, and pinnatifidum. 
He agreed there was no direction to be made out, 
