FACTS VERSUS THEORIES 203 



have never been recorded or considered; also that 

 they could not have been known to closet naturalists 

 who have constructed theories about migration, nor 

 can they be known to anyone except to someone 

 like myself who has lived long and intimately with 

 birds until their language has been mastered — 

 language of sound and motion — ^which tells you 

 what they feel and what they mean. 



