by Mike Krumboltz Huguette Clark may be the wealthiest person you've never heard of. She's certainly one of the most mysterious. The 104-year-old heiress owns sprawling estates in California and Connecticut, as well as one of the largest apartment on New York's Fifth Avenue. But, according to a very buzzy report from NBC's "The Today Show," Ms. Clarke hasn't been seen at her homes in decades. Reporters Bill Dedman and Bob Dotson investigated her whereabouts and found that Ms.