Maybe someday, officials will put up a statue marking this quaint village as the birthplace of "Calvin and Hobbes." Just don't expect cartoonist Bill Watterson to attend the unveiling ceremony. It's been nearly 10 years since he abruptly quit drawing one of the most popular comic strips of all time. Since then, he's been as absent as the precocious Calvin and his pet tiger, err, stuffed animal, Hobbes. Some call Watterson reclusive. Others say he just likes his privacy. "He's an introspective person," says his mother, Kathryn, standing at the front door her home, its yard covered by a tidy...