Q^ them^ make any sign that 

 he desired to retain them^ 

 beyond a certain air of at- 

 tention in his Jiostiire, Uji- 

 on repetition on a differ- 

 ent day^ his behavior was 

 the same: there was no 

 attempt at imitation. But 

 sometime afterward^ quite 

 unexpedtedly^ in the hila- 

 riousjlow of his birdsongs 

 would appear aperfedt re- 

 produBion of the whistled 



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