 The rumor of cancellation had apparently originated Monday night with the leadership itself, before the results of King's call had begun to show. In the time intervening before the final decision was made and the procession began, Leroy Collins, head of the Federal Community Relations Service, flew to Selma and began a series of last-ditch efforts to mediate what seemed an imminent collision between marchers and troopers, and his efforts bore fruit. Though few of the marchers were aware of it,