Aschaffenburg, 



Honored Siri 



Many thanks for the repeated friendly shipments of the Pinus - Hysterian , 

 which interest me very much. Unfortunately just now with the end of our Semester, 

 through the corapletion of other work, the endless examinations, Conferences etc., 

 my time is so much in demand that, for the time being, a careful examination is 

 impossible, so please excuse me if I can hold out the prospect of a detailed report 

 only after vacations, in 2 months. I will gladly place it completely at the dis- 

 posal of the Torrey Club, and I am also especially grateful to you that you gave me 

 the opportunity to at least see this publication one time, in which I found quoted 

 a number of articles, which are very important to me, especially of Eaton and others 

 about American ferns (this class at present is the subject of my special study); 

 only I could not get it. If now I should perhaps have the opportunity, through your 

 friendliness if occasion arises, to see this bulletin more often, I would be obligated 

 to greatest thanks and I would be at your disposal for any service. 



Yours respectfully, 



Prof. Dr. K. Prantl 



