(Letter from JuiU’ifli Walt on continued. ) 
the theory that there has been within the last fifteen or twenty 
* 
years a decided westerly movement of the bulk of those flocks which 
£ which formerly confined themselves to regions East of the Rockies. 
It may be very possible, that there are immense uninhabited 
tracts in the far West which have been for some years the scene of 
an annual migration o± these birds , and though chance observers (as 
Mr. Cope) may have frequently encountered them, it has not attract- 
ed attention or not been noticed for lack of sufficient interest 
or knowledge in the observer. The Wild Pigeon in Washington Terri- 
tory were evidently migrants and their north ern flights would 
indicate a breeding place far west of any on record. 
