Chapter 1 (RBoC)

On hills by a river an army rests, waiting for battle. A tall soldier (Jim) comes back to the camp from washing his shirt with information that they are moving out tomorrow to sneak up around the other army from the back. Everything stops while the tall soldier explains this rumor he heard at the river, but one loud soldier denies everything he says. Then the camp explodes with excitement and soldiers start debating about what is about to happen. One young soldier (Henry) gets up and leaves his excited companions to go into his tent and think about his life before he enlisted and the day he left and what his mother said to him. He then starts to think about the next day and if he might run from the battle since he has never been in one before. While thinking about this, Jim and the loud soldier come into the tent he is in, still fighting, and then the three of them talk about the next day. Henry is comforted by what Jim says to him, and is glad they came in at that time.

Question- How long have they been at that camp if a rumor is believed as fast as it was?