Dutch-American illustrator and cartoonist (1867-1937) known for his word play and visual tricks; he may be best known for his 'Upside Down' series, in which the artwork showed two different images depending on its orientation. Five original pen-and-ink sketches by Gustave Verbeek, accomplished on off-white sheets ranging in size from 5.5 x 7 to 8 x 9.5, highlighted by a "Lines to Autumn" illustration, which is especially interesting as the word "Autumn" appears to read "Gustave" when turned upside down. Other images show two boys crawling through a window, three men in a doorway, an Arab with a ook tucked under his arm, and a young boy being paddled. Only the last cartoon is signed by the artist, signed in the lower right corner, "Verbeek." In overall very good to fine condition, with scattered soiling, light staining, and tiny tack holes.