7 . 
P.S. In the Spring of 1900 Mr.Josiah Hoopes 1 brother put up 
two Martin boxes near the original one at their place in West 
Chester, and I think this was one of the reasons, and probably 
the principal one, that the experiment was not a complete 
success . 
(Copy of a letter loaned by Hr. Charles J.Pennock 
in January, 1904). 
r* 
