CHAPTER XIV 
MIGRATION 
FOR ages past the mysterious going and coming of 
birds has excited the notice and wonder of mankind. 
The familiar proverb “One Swallow does not make a 
summer” is quoted by Aristotle. The noisy march of 
the Trojans is compared by Homer to the clamorous 
flight of a flock of Cranes migrating southward. 
“The Trojans marched with clamour and with 
shouting like unto birds, even as when there goeth up 
before heaven a clamour of cranes which flee from the 
coming of winter and sudden rain, and fly with 
clamour towards the streams of ocean.’1 In a book 
of still more ancient date, the Book of Job, we read of 
the southward flight of the Hawk.? Till comparatively 
recent times, however, men were content to let the 
mystery remain a mystery. Gilbert White of Sel- 
borne puzzled and puzzled over the problem of 
migration. He knew that most of the Swallows flew 
far southward for the winter, but he could not entirely 
1 Jiiad, iii. 1. 2, Lang, Leaf, and Myers’ translation 
* Chap. xxxix. 26. 
