I know where to find the missing N. It gets tacked on to 'a' when used with 'historic.' It grates my nerves to hear 'an historic.' Why on earth would anyone think that's correct?? I remember reading in one of my high-school English classes that "only an illiterate would say 'an historic' " and I've dedicated my life (or at least sporadic seconds here and there) to trying to find the source of that quote. When I do, I am going to staple the citation to the forehead of anyone who utters that annoying phrase.