Charles Dana Gibson: The Man and His Art, With a Brief but Entertaining Narrative of Two Gibson Girls. E-book. Formato PDF Collier's Weekly   -  Forgotten Books, 2017  - 

Art is proverbially a stern mistress. Many a man has served a harder apprenticeship than did Gibson, but his probation was sufficiently trying, as has been hinted already, and be proved by frequent reverses the old, old truth that there is no royal road to success. Two years of study with the New York Students' League and a brief course later at Julien's atelier in Paris — that was the sum of Gib son's artistic education so far as it was picked up in the professional schools.