Mr. Alex Wetmore - 3. 
Trusting that you will have no difficulty in getting material for 
Doctor Cobb’s examination, I remain 
Very truly yours, 
N. B # - Doctor Cobb is very certain that if nematodes infested the 
digestive tracts of the diseased ducks in sufficient numbers to produce 
a serious sickness this fact would not have been overlooked by the experts 
of the Bureau of Animal Industry when they examined the dead ducks that 
have been sent in from Salt Lake. Apparently, however, nobody has ever 
looked in the blood for the larval form of nematodes. 
