Known as 'Crockett Johnson' to admirers of his cartoons and children's books, this talented artist spent the last ten years of his life on an odyssey in mathematics, beginning with the study of historic mathematical milestones, including the three 'impossible' construction problems of the classical Greeks. While documenting in abstract paintings the achievements of others, he embarked on his own mathematical investigations, concluding his work with an original solution of the construction of a regular heptagon, using a technique employed by both Archimedes and Newton. Crockett Johnson's abstract paintings present gems in a large body of mathematical knowledge: without symbols, equations, or words, these works of art depict the often hidden beauty of mathematics.