ii8 RECREATIONS OF A NATURALIST 



river Trent." Three years later, namely in October 

 1875, he was able to record the fact of two having: 

 been shot in his own neighbourhood, near Ulceby. 

 Nor have the peregrinations of these birds north- 

 ward been impeded by the Humber, which,, 

 notwithstanding its width, they must have crossed 

 on their way into Yorkshire if (as stated by Messrs 

 Clarke and Roebuck in their excellent Handbook of 

 Yorkshire Vertebrata) there is no evidence to show 

 that this species was ever introduced into that county. 

 They observe that it is now " resident in various 

 parts of Yorkshire, but in extremely limited 

 numbers, and only very occasionally shot." If 

 then it is not an introduced species in Yorkshire,, 

 but has found its way there naturally or accidentally, 

 it seems more reasonable to assume that it has got 

 there from Lincolnshire (in continuation of the pro- 

 gress from Norfolk) rather than from Northumber- 

 land through Durham, in which last-named county 

 there seems to be no record of its appearance. At the 

 same time it is quite possible that the few noted by 

 Mr A. G. More {Ibis, 1865, p. 428) as "breeding 

 very rarely in West Yorkshire," may have crossed 

 the western border of that county from Westmor- 

 land, and so perhaps may be descendants of the 

 Northumbrian stock originally introduced at 

 Alnwick. 



From Lincolnshire, also, it seems probable that 

 the Red-legged Partridge has found its way into the 

 adjoining county of Nottingham, where, we are 

 assured on good authority, it appears to be increas- 

 ing. 



