PREFACE. vii 



the original observer had a well-earned reputation. I would 

 rather state what I believe to be true and be corrected if in 

 error, than copy an orthodox view which may, some day, be 

 shown to be misleading. 



To all who have provided photographs for the black and 

 white plates I am grateful, and for the assistance in field 

 observation given by many personal friends. Miss E. L. 

 Turner supplied the photographs for Plates 3, 22, 25, 30, 34, 37, 

 47, 49» 52, 58, 60, 88, 90, 99, 109, 121, 122, 125, 127, 128, 139, 

 144, 146, and end papers i and 2 ; Mr. T. Taylor for Plates 8, 

 II, 40, 67, 76, 79, 83, 86, 92, 97, loi, 102, 104, 106, 118, 148, 151, 

 153, 155, and end paper 3 ; Mr. R. Chislett for Plates 16,43, 5o> 

 63, 65, 70, 72, 84, 134, and 142 ; Mr. R. Kearton for Plates 33, 

 69, 75, 81, 113, 141, and end paper 4 ; Mr. O. J. Wilkinson for 

 Plates 95 and 132 ; and Mr. A. T. Mole for Plate 5. Plate 6 is 

 from a photograph by the late Canon Bower, and is reproduced 

 by the kind permission of Mrs. Bower; Plate no is from my 

 own photograph. 



T. A. COWARD. 



