See pages 263-269 which comments on 'Les Barbets.'
https://books.google.com/books?id=VdOZAXT_lskC&pg=PA263&dq=les+barbets&hl=en&sa=X&ved=0ahUKEwi0qYPFuefjAhUnU98KHUYlARkQ6AEIMDAB#v=onepage&q=les%20barbets&f=false