Katherine Lanpher, whose essays have appeared in the New York Times and More magazine, officially moved to Manhattan on a leap day, transferring from a rooted life in the Midwest to a new job, a new city, and a new sense of who she was. But re-invention is a tricky business and starting over in the middle of life isn't for the feint of heart. Katherine Lanpher's short essay on her first six months in New York--"A Manhattan Admonition"...