Death of a Swagman

A cypher that looked like a child's game of noughts-and-crosses; a strip of hessian bag; the rhythmic clanging sound of the turning windmill suddenly breaking the silence of the night; the minister who seemed out of place as a churchman: these were some of the more puzzling aspects of the case of the murdered swagman noticed by the keen eyes of Robert Burns, alias Detective-Inspector Napoleon Bonaparte, alias "Bony"