The Zoological Society of Philadelphia. 
Fa i rmoun t Park . 
Philadelphia, August 13, 1399. 
My dear Mr. Ho opes - 
I regret that- I did not see you the last time you were 
here. I am beginning to think that my experiment with the 
martins may be successful after all. I also believe that at 
least two of my young birds have been to West Chester more 
than once and I would like to have you or some one keep an 
it 
eye on your box and we may be able to prove as these birds 
are marked so they can be known. One of them has the second 
quill on each side of the tail squared off in this manner 
and the other one has one quill on each side of the two cen- 
tral tail feathers cut in the same manner, so I marked 
these two birds in this way so I would know them if they came 
back next spring, the mark can be easily seen at quite a dis- 
tance if you are nearly under them. These two birds are now 
able to take care of themselves, are often away for hours, on 
several occasions after being away for a long period they have 
come back with other martins and today two old birds came here 
at 9.30 and when they left at about 10. took one of mine with 
them, she did not return until 4. this afternoon. 
Our man told me you said you had only five birds left when you 
were here. On August 6 I counted five strange martins flying 
with mine. I would like to hear from you soon. 
Very truly yours, - Rob't D. Carson. 
-H 
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