 After the morning roll call came up over a hundred short, the Confederates counted frantically several more times to ensure that the Yankees weren't pulling a trick.Such "tricks" had occurred on many occasions when men slipped in and out of the counting lines; this "repeating" was a mild prank often used to frustrate the Confederates at roll call, much to the glee of the Union prisoners.On the morning of February 10, the Confederates realized that this was no trick.