Julia Mary Cartwright Ady (1851-1924) was an English art art historian and biographer of the Italian Renaissance. This book is an unabridged reprint of the second edition of her book published by Swan Sonnenschein & Co., Lim., London in 1902. First edition published September 1896.
For an introductory discussion about Millet and the Painters of Barbizon, I recommend Jonathan Ribner's lecture A New Look at Impressionism: Millet and the Painters of Barbizon courtesy the Museum of Fine Arts, Boston.