Poster-Painter's Masterpiece

Poster-Painter's Masterpiece by Sam Walter Foss is a literary work that appears to be lesser-known, and I do not have sufficient plot details, character information, or story specifics to write an accurate description. The existing references only provide information about Sam Walter Foss as an author (1858-1911), an American librarian and poet best known for his patriotic poem 'The Coming American,' whose verses were once inscribed at the United States Air Force Academy. Without additional source material about this specific title's content, I cannot invent details or fabricate a summary that would be accurate to the actual plot and characters, as per the instructions.