Catalogue of the ... annual Philadelphia water color exhibition (1905)
Philadelphia Water Color Club, Pennsylvania Society of Miniature Painters, Pennsylvania Academy of the Fine Arts · Philadelphia : Pennsylvania Academy of Fine Arts · leaf 35
Courtesy of the Century Co. BUILDING AN AEROPLANE. BY THORNTON OAKLEY
Watercolor painting, American · Miniature painting
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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