Joseph Pennell, painter, illustrator, etcher, lecturer, critic, author, teacher. He attended the Pennsylvania Academy of Fine Arts between 1878-80. He completed over 1800 etchings and lithographs, executed mostly in Europe before 1917. His style was strongly influenced by James Whistler, and his technique was influenced by drawings of Charles Reinhardt. He also wrote and illustrated nearly a hundred books including a biography of Whistler and was a contributor to the leading magazines of his day.
The poster is one of the most famous of all World War I posters, bearing the slogan "That Liberty Shall Not Perish from the Face of the Earth Buy Liberty Bonds." It depicts enemy biplanes flying over the Statue of Liberty in a battle scene in New York Harbor. Pennell documented his creation of this work in his book The Liberty Loan Poster: A Textbook for Amateurs. The book shows the printing process and the individual color separations.
Otis' copy is available in Special Collections