From a young age, McCay was a quick, prolific, and technically dextrous artist. He started his professional career making posters and performing for dime museums, and in 1898 began illustrating newspapers and magazines. In 1903 he joined the "New York Herald", where he created popular comic strips such as "Little Sammy Sneeze" and "Dream of the Rarebit Fiend". In 1905 his signature strip "Little Nemo in Slumberland" debuted—a fantasy strip in an Art Nouveau style about a young boy and his adventurous dreams. The strip demonstrated McCay's strong graphic sense and mastery of color and linear perspective. McCay experimented with the formal elements of the comic strip page, arranging and sizing panels to increase impact and enhance the narrative. McCay also produced numerous detailed editorial cartoons and was a popular performer of chalk talks on the vaudeville circuit.