JET. 56.] TO GEORGE ENGELMANN. 551 



The seeds I put loose in this sheet are Cinchona 

 officinalis. Get the tree introduced into your cooler 

 region, that is, the Caffetals of east Cuba, and the 

 tree will be commercially important in time, and you 

 will be a benefactor of your species.' Enough for 

 once. Ever your old friend, A. GRAY. 



TO GEORGE ENGELMAISTN. 



November 20, 1866. 



DEAR ENGELMANN, Yes, I have a heap of un- 

 answered letters from you. But I have not one mo- 

 ment of time. 



I have copy of " Manual " in printer's hands up to 

 Composite, and am only now two days ahead ; have 

 been only two hours ahead day after day ! ! It is 

 awful ! So much other work too ! . . . 



If I could get five hundred to one thousand more a 

 year I would at once resign professorship and sal- 

 ary. . . . 



I am well, never more hearty ; but worked like a 

 coach-horse. I have got my fund raised for the Gar- 

 den : small, but we have now clear $2,500 or $2,600 a 

 year for Garden. 



February 27, 1867. 



How much I am indebted to you ! No one else 

 who undertakes to help me ever makes out much, at 

 least to save me time and trouble. . . . 



I have not time to write details of the little I know 

 about the National Academy. But I have seen 

 enough to make it clear that I should not be taking 

 any more responsibility about it. So last month I 

 sent my resignation. They have put me on the list 

 of Honorary Members. The American Academy is 



