HT. 44.] TO A. DE CANDOLLE. 419 
About Fouquiera ; I have examined it here repeat- 
edly on the live plant, which every year prolongs its 
main axis an inch or two. An took leaves to 
Providence to show there, especially to remove any 
lingering doubt on Torrey’s mind. For Torrey would 
long have it that the spine was a primary leaf, and 
that an axillary leaf adhered to it by its petiole. He 
now knows better. 
I just saw Agassiz. He looks well and strong.... 
I read Alphonse De Candolle’s “ Géographie Bota- 
nique Raisonnée”’ on the voyage home: a most able 
work it is, full of interesting matter very methodically 
arranged. Hooker and Thomson’s “Flora Indica,” 
vol. i., is famous for its able introductory essay, ete. 
TO A. DE CANDOLLE. 
October 27, 1855. 
Your welcome letter of the Tth of August duly 
reached me. I meant to have surprised you by an 
answer dated at Paris; but the eleven days I passed 
there were too busily occupied to allow it. M. Bois- 
sier will have told you of my sudden voyage, and the 
cause of it. I was absent from home only six weeks 
and a day; and twenty-two days of the forty-three 
were passed on the water. On returning home I 
found here: 
1. The excellent lithographed portrait of yourself, 
a pleasing and pretty good likeness. Of the three 
copies I have offered one to Torrey, the other to Short. 
2. The copy of “Géographie Botanique,” which 
you so kindly addressed to me. (I have already 
learned that Agassiz and Darlington have theirs; but 
Torrey not his, and I have directed inquiries to be 
made.) This was not my first introduction to the 
