but if you don't hear from me, 如果没有收到信

383. Listen to Maester Luwin. Look after your little brother.
     听从鲁温师傅的意见，好好照顾弟弟
384. I will.
     我知道了
385. I'll send letters whenever I can,
     有机会我就会写信给你
386. but if you don't hear from me,
     如果没有收到信
387. don't be scared.
     也不要害怕
388. Until I return.
     等我回来
389. How long have you been hiding outhere?
     你躲在那儿多久了

来自《权力的游戏 第一季 第八集 Game of Thrones S01E08 奈德性命堪忧》第 386 行