^T. 69.] TO A. DE CANDOLLE. 699 



I think I must work at Aster, etc., at Kew for a 

 few weeks ; and I have a fancy for a run through the 

 west and south of France and, perhaps, Spain ! 



You will be returning from some summer trip 

 about the time we reach England. Cannot you and 

 Mrs. Church get away from a dark and dull London 

 November, and go with us to a summer region ! 



I sent you my Yale Lectures, which had to treat 

 difficult and delicate matters. I find they have been 

 useful to some on either side. 



TO A. DE CANDOLLE. 



CAMBRIDGE, June 8, 1880. 



I have left your kind letter of March 11 too long 

 unacknowledged. Now I have to thank you for a 

 copy of the " Phytographie," which interests me ex- 

 ceedingly. I have also to say that my plans for the 

 year are so far settled that I have engaged passage 

 for Mrs. Gray and myself in a Cunard steamer from 

 Boston for Liverpool on the 4th of September, the 

 earliest date on which we could leave home. 



But, greatly as you tempt me, and much as I 

 should like to see you early, we cannot reach Switzer- 

 land this autumn. . . . 



I should hope we might see you in early summer. 

 So, pray, keep yourself well and strong till then. 



About the " Phytographie : " I shall have much to 

 write, when I read the book, which as yet I have only 

 glanced at. About dextrorsum and sinistrorsum : I 

 think it is not quite true that the innovators have not 

 given any account of the grounds on which they rest. 

 Mine are expressed, I believe, in two or three notes 

 in " American Journal of Science," and are summed 

 up in my " Botanical Text-Book," last edition, p. 516, 



