The Guthrie is supporting local playwrights through the Ruth Easton New Play Series — a collaboration with the Playwrights’ Center to develop 10 works over two years. Part of that development comes in the form of staged readings of works in progress. 3-Minute Egg attended one such reading on Martin Luther King night — Carlyle Brown’s Down in Mississippi, a piece of historical fiction inspired by the fight in the Deep South to register black college students to vote.