Dec. 18, 1909. 
Dear Dr. Farlow:- 
Yours of the 17th is at hand. Thanh you very 
much for the same. 
It did not occur to me that you might he very busy arranging 
for.the A.A.A.h. meeting or I would not have sent the specimens 
until after Jan, 1. Under the circumstances I an sorry that you 
tooh the tine to examine the specimens and reply while"you were 
so busy. 
It is only fair to you to state something that I did not mention 
in my letter of the 14th, as that was written rather hurriedly. 
My Do.5521 was collected on a small dead for partially dead} branch 
of Blac’* Oak lying on the ground in an orchard in Martic Forge, Da. 
where the Chestnut Bath Disease was prevalent. There were apparent 
ly two email fungi growing on the branch, one a dark colortd" one 
('which I suspect is the dphaeropsis) and another one forming very 
small orange or red pustules.from which were projecting (when 
collected} small yellowish thread-like masses of spores almost 
exactly like Murrill's khiaporthe" when examined under a hand lens. 
Half of tie branch was at once sent to Washington where cultures 
were made from the"red” fungus. A little later these cultures 
were used to inoculate Chestnut trees out of doors. All of these 
inoculations developed the characteristic "Diaporthe” lesions 
within three months. 
I ohly recently learned the above facts from Dr. Metcalf. At the 
forst opportunity I looked up the half of the branch that I had 
retained, cut it in two and sent half of it to you with my letter 
of the 14th. This was packed, and the letter written, rather 
hurriedly in a few spare moments just before £ had to leave to 
attend an important meeting. As a result I probably forgot to 
call your attention t® the small reddish pustules just below the 
small branch on the specimen sent. Dossltrly the pustules were 
rubbed off in transit, or, possibly, they were not exactly the 
same as those sent in to Washington, though I supcosed they were. 
They were certainly from the o.-.me branch at any rate. 
If the specimen has not been destroyed 7/ill' you look again 
(after the A.A.A,3. rush is over) and see if there are any of 
these little red pustules left? These are really what the spec¬ 
imen (Ho. 5521) was sent for. 
As I can find no mention of 3ph.aerop.eis linearis being reddish 
I assume that these juistules were either rubbed off in transit 
or r/ere overlooked. There were only a few of these reddish spots 
on the material I kept. 
Tory truly yours, 
Collaborator, 3. D..1 
