^:t. 44.] rO 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 CandoUe's " Geographic Bota- 

 nique Eaisonnde " 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 CAlfDOLLE. 



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 



