Comment by Harlock on The Disinherited Noble's Skill Master: I Was Banished, but I Became the World's Strongest with "Skill Creation"!? - - Chapter 2

It doesn't make sense, how can a postal mail arrive before them?... They are running at supersonic speed, it normally takes 3 days by carriage to arrive, so obviously the mail can't arrive before them, unless they're using a magical Fax Machine