As they walked towards the railway station, their mother took an envelope from her handbag.
Night after night wailing bombs and screeching planes skim the.
Promise me.\' England, 1943: Home is no longer safe for eight-year-old twins Molly and Jacob .
You\'re never to open it unless you or your sister are in real trouble. \'I want you to keep this somewhere safe.\' \'What\'s in the letter?\' \'Listen carefully.
As they walked towards the railway station, their mother took an envelope from her handbag