[3] In 1915, he began writing for The Modern School Magazine, a publication concerning key issues in libertarian education, and took over as editor in 1917.

He began his art career working for Frederick Keppel, a New York print dealer.

"There he learned the art trade and met many famous collectors, literati, artists (most notably Rockwell Kent) and curators.

[5] The Dictionary of Art Historians notes that during his years with the Weyhe Gallery, he "helped establish many American artists.

[6] In 1940, Zigrosser was approached by Fiske Kimball, who sought to hire him as curator of prints at the Philadelphia Museum of Art.