Inside, the few Negroes who arrived for classes chose their places carefully, whispering of sniper angles. Moses left for a registration drive in nearby Bolivar County, but the following midnight Sam Block called him there in hushed panic, to report that several carloads of armed men were staking out the office. What coiled the fear most tightly was the stark awareness that it was absurd to hope for police protection—Block had seen police cars pull out just ahead of the posse.