Snow White and the Seven Dwarfs (1935).
Carls Barks, about 35 years old at the time, submitted this drawing to the Walt Disney Company in the hopes they’d give him a job. They did, and for several years he’d work in the animation and story departments there, providing ideas and gags for Donald Duck cartoons. Eventually, he left Disney again and started a chicken farm, but returned when asked to handle comic duties. The rest is history, as they say–as in that capacity, he invented Duckburg, Scrooge McDuck, Gyro Gearloose, Gladstone Gander, and countless others.
To me, Carl Barks and Jim Henson belong up there, in the Pantheon of Creative Gods. If you’ve never read a Carl Barks story you really should: it’s storytelling at its finest. Any aspiring author, comics artist, illustrator, or even filmmaker should study his work. And don’t just take my word for it: Steven Spielberg and George Lucas have said the same thing.