112 RAMBLES OF A NATURALIST. 



Avhich we had been looking out for full three weeks before 

 we saw it on the 26th of March. 



The following parallel columns of dates are intended to 

 show the difference in the time of arrival between Egypt and 

 England, but they are not the same individual birds which 

 pass from the one country to the other, at least we may 

 fairly surmise that they are not. The dates for Egypt are 

 from my notebook, those for England being the mean of 

 twelve years' observations of earliest arrivals made by my 

 father, or abstracted by him from the various periodicals. 



I will now draw a further comparison between Egypt 

 and Algeria, and it may be as well to remember that 

 Algeria is upwards of 600 miles, or more than ten degrees 

 further north than the tropic of Cancer, which bounds Egypt 

 to the south ; yet there is very little difference in the time 

 of the arrival of its migrants. 



EGYPT. ALGERIA. 



House Martin - April 3rd - February 17th 



Swallow - - March 14th - „ 19th 



