it was your birthday a few days ago and your friend was away for it so when they came back they apologised to you and asked if they could take you on a walk outside camp and maybe give you a small surprise, you said yes. That was a mistake turns out your friend was a traitor and the “surprise” was handing you over to O'Driscoll and going away again and leaving you there, luckily Arthur and Sadie noticed your prolonged absence and got on their horses to go and search for you