198 THE MIGRATION OF HIRUNDO RUSTICA. 
you have never before meditated on a small bird’s life, you 
will acquire a new notion: that you harm yourself and your 
children if you injure this true small friend. You will then 
recognize in yourself a protector not only of the Swallow 
but of all useful birds, which were sent into the world to do 
good to mankind, and are therefore not to be killed for 
vanity’s sake. 
