Jan. 5, 1910 
Mrs. E, (J. Britton, 
Botanical Carden, 
Hew York City. 
My dear Mrs. Britt on:- 
Thank you for your 
offer of help on the Borth American Polyt- 
rlchaceae. I shall certainly avail myself 
of the opportunity later, as soon an I under¬ 
stand my own material a little better. 
Am glad to hear of Mr. Bichol’s discovery 
of fogonatum brachyphyllum , and also that 
Mr. Chamberlain agrees with what I published 
in Bhodora (8:132) in July, 1906, in regard 
to ogonatum alpinum . 
With the season’s greetings, 
Very truly yours. 
