XVI PREFACE 



Our best thanks are due to Dr. Duerden for kindly 

 advice; and to Doctors Gough, Kirkman, and Eobertson, 

 and Messrs. Millar, Draper and Pym, for the loan of 

 photographs ; and to the Council of the South African 

 Ornithologists' Union, for the loan of several blocks. 



To the students of African ornithology this work is 

 respectfully dedicated by 



THE AUTH0E8. 



MOPDEEFONTBIN, TrANSVAAL, 



September 1, 1907. 



