The unveiling of the new Dennis the Menace stamp has kept Mint Hill’s Marcus Hamilton busy in the past month. Last month, he went to Ohio State University where the official unveiling of the stamp took place. Then Tuesday, the Mint Hill Post Office honored him with a local unveiling of the stamp. In the audience: Two Mr. Wilsons, a large Dennis mascot, and several Dennis look-a-likes, including Marcus’ grandson, Conall Millward.