492 CONCLUSION. 



It was my intention to include in this volume the remaining 

 Terrestrial and Aerial birds, with the exception of the Rap- 

 tores ; but it has been found that these groups would occupy 

 nearly four hundred pages. I have therefore to intimate that 

 the Third Volume, which is now in progress, will appear on 

 the 1st of February next, and will contain the orders Repta- 

 tores, Immersores, Volitatores, Excursores, and Raptores. 

 Should these volumes be favourably received, the Fourth, con- 

 taining the Grallatorial, and the Fifth and last, occupied by 

 the Natatorial series, will be brought forward at intervals 

 shorter than that which is marked by the dates of the present 

 and the first volume. The intelligent reader may form a suf- 

 ficiently correct estimate of the labour aud expense necessary 

 for presenting so extensive a work to the public, to enable him 

 to perceive that any recommendation of it which his estimate 

 of its merits may permit him to make, will be gratifying to 

 the publishers as well as the author. 



