L

Compared with M, L was a straight arrow. L had risen to a position of responsibility, next to the second floor, office-like-station window which was next to the door to the grain chute. That was where grain had to be carefully selected, measured and dispatched to wagons on the street below. L was the right letter to keep things running right. In truth, L had harbored suspicions about M for some years, but L was nothing if not a team player. L said little, a letter of few words when it came to M's dirty little secret.