The Zoological Society of Philadelphia. 
Fairmount Park. 
Philadelphia, July 30, 1901. 
Dear Mr.Hoopes, 
I regret I can say nothing very encouraging about the 
Martins. As you know, they bred in my box last year and I 
was quite sure I would have more this year, but, although, 
several pairs came and remained several weeks, they finally 
left; some or all of them have been back at intervals but they 
certainly have not bred here and I have seen none at all for 
the past three weeks. I hope for better luck next year. 
Very truly yours, 
Rob't D. Carson. 
( copy ). 
