124 REVIEWS. [VOL. vii. 



birds, and a resume of their relation to forestry, besides a 

 useful bibliography. The main part of the book, however, 

 is devoted to details of his investigations of the food of twenty- 

 nine species. These details are extremely interesting and 

 most valuable, not only from an economic point of view, but 

 also to the ornithologist. We think, however, that many of 

 the author's conclusions as to the economic status of a 

 species are based on quite insufficient data. We hope that 

 Mr. Collinge will continue his investigations and add to our 

 knowledge of the nature of the food of our birds, a subject 

 concerning which he and a few others have done much in 

 recent years to enlighten us. H.F.W. 



LETTER. 



TUFTED DUCK BREEDING IN ESSEX. 



To the Editors of British Birds. 



Sirs, — Mr. Miller Christy, in his very interesting letter in your 

 last issue (p. 91), remarks that I have not done justice to the bird-life 

 on Walthamstow Reservoirs, but I must point out that my note 

 was only intended to record the nesting of the Tufted Duck. 



I am surprised Mr. Miller Christy has not mentioned the Pochard 

 as, after the Tufted Duck, this is certainly the most plentiful. On 

 8th February, 1913, I saw a flock of seventy-six, male and female. 



A full list of the many interesting birds which may be seen at 

 these reservoirs is really only of local interest, and I will refrain from 

 occupying more of your space on this matter. William E. Glegg. 



Stamford Hill, August I2th, 1913. 



