midnight
He tucked Patty 's hand in his arm , and as they walked to the dining-room , he murmured : `` You really are a Captive Princess now , are n't you ? '' `` Yes , I am ; and if you 're my Knight , are n't you going to deliver me from durance vile ? '' `` Of course I am . I will be under your window at midnight with a rope ladder and a white palfrey . '' `` Well , if I 'm awake I 'll come down the ladder ; but if not , do n't expect me . '' `` But if you want to be rescued , you must take the opportunity when it offers . '' `` Oh , I 'm not so sure I want to be rescued .