The blockhead, collected: The New York Times (registration required) talks to Charles M. Schulz's widow, Jean Schulz, about the release of The Complete Peanuts, 1950-1952:

"There's nothing like seeing his work in its entirety, day after day, the little changes. ... I'm not a Peanuts expert. It's the first time I've looked at his early work in anything except when I archived the strips."