viii PREFACE. 



parts written by him are the Thrushes, Shrikes, Fly- 

 catchers, Dipper, and birds of prey (Accipitres and 

 Striges), which have now been re-written and brought 

 down to date. 



I take this opportunity of expressing my grateful 

 thanks for the valuable assistance he has rendered me 

 during the past six years, and for placing at my dis- 

 posal the whole of his collected information up to the 

 year 1888. 



I am also indebted to Mr. W. Denison Roebuck, joint 

 author with Mr. Eagle Clarke of the " Vertebrate Fauna 

 of Yorkshire," who has placed unreservedly at my dis- 

 posal the ornithological portion of his collection of 

 printed records, the result of many years' bibliographical 

 examination of the literature of Yorkshire zoology, and 

 to Mr. F. Boyes, who has supplied many notes on the 

 East Riding. 



My sincere thanks are tendered to Professor Alfred 

 Newton, Messrs. Howard Saunders, J. E. Harting, W. 

 Denison Roebuck, J. H. Gurney, T. Southwell, C. E. 

 Millburn, and to my veteran taxidermist, George Mussell ; 

 also to the naturalists whose names appear on p. 

 xxx., and to my friends who have most gener- 

 ously presented me with materials for the purposes 

 of illustrations : Mr. W. Woodhouse, who designed 

 the sketch on the title-page and granted the privilege 

 of using two oil paintings of Bempton Cliffs, in addition 

 to several sketches ; Mr. John Charlton, who has con- 

 tributed a sketch ; whilst numerous photographs have 

 been supplied by Messrs. Riley Fortune, E. W. Wade, 

 H. Lazenby, E. G. Potter, and S. Smith. Other illustra- 

 tions have been added by Messrs. J. Backhouse, W. B. 

 Tegetmeier, T. A. Lofthouse, and T. Sheppard. 



As it has been found inconvenient to mention author- 

 ities in the text in every case, a general acknowledgment 

 is made by stating, after the contributor's name in the 

 appended list, the district to which his notes refer. Those 

 marked (*) have furnished lists of birds : 



