17 Jan, 1910. 
Mr, C. C. Zingman, 
324 Ilorth Raymond Ave. , 
'asadena, Cal. 
My dear Mr. Kingman:- 
Yonr letter and specimens 
came today. Thank you for "both. 
I am spending most of my spare time on the 
genera Catharinaea, oponatur:, and Polytrichum. 
I would be very plad to pet Californian speci¬ 
mens of these genera, named or unnamed, common 
or uncommon. In return I think I cansend 
you something in the way of mosses in exchange, 
although at present I have no list of my 
duplicates, hut hope to have one when I can 
get my duplicates organised. 
I would particularly like to get the differ¬ 
ent common forms of the common -olytrichum 
commune. If you can get hold of any of those 
perhaps vrc can effect an exchange when you 
get hack East again, or even before that. 
Very truly yours, 
