LETTER XXII. 



To the same. 



SEI.BORNE, Sept. \yh, 1774. 



EAR SIR, By means of a straight cottage 

 chimney, I had an opportunity this summer 

 of remarking, at my leisure, how swallows 

 ascend and descend through the shaft; but 

 my pleasure in contemplating the address 

 with which this feat was performed to a 

 considerable depth in the chimney was some- 

 what interrupted by apprehensions lest my eyes might undergo 

 the same fate with those of Tobit.* 



Perhaps it may be some amusement to you to hear at what 

 times the different species of hirundines arrived this spring 

 in three very distant counties of this kingdom. With us the 

 swallow was seen first on April the 4th, the swift on April 

 the 24th, the bank-martin on April the i2th, and the house- 



Tobit ii. 10. 



