JET. 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. And I 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 " Geographic Bota- 

 nique Raisonnee ' 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, etc. 



TO A. DE CANDOLLE. 



October 27, 1855. 



Your welcome letter of the 7th 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 " Geographic 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 



