(Sray Iberbarium 
B. L. ROBINSON, Curator, 
Asa Gray Prof. Syst. Bot. 
M. L. FERNALD, 
Fisher Prof. Nat. Hist, (Bot.) 
J. F. MACBRIDE, Assistant 
H. ST. JOHN, Assistant 
MARY A. DAY, Librarian 
■foarvari* University 
CAMBRIDGE, MASSACHUSETTS, U. S. A. 
Jan. 9, 1918. 
Prof. J. F. Collins, 
468 Hope St., 
Providence, R.I. 
Dear Collins: 
I shall be very glad indeed if I may take for the next club 
meeting the three slides you mention of Adiantum , Polystichum , and - 
Cryptogramma densa , the latter plant, according to Butters who work¬ 
ed over the group very carefully, is more accurately placed under 
Pellaea , but that is a minor matter. I am glad that you found the 
slides for I was morally certain that I had seen them. Do not trouble 
uo send them on if you are coming to the meeting, for I can quickly 
insert them in the series at that time. 
Sincerely yours. 
Dictated to HMB 
