William Cook 
Ducks [PDF ebook] 
And How to Make Them Pay

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The book has now been revised, and brought up to date, with much additional information, which it is hoped will help duck keepers to become more successful in the future, even than many who have been successful in the past.