The Question and Answer section for The Lion, the Witch and the Wardrobe is a great resource to ask questions, find answers, and discuss the novel.
The children, like thousands of children during the war, were sent to the country for their safety. London was under constant attack from air raids during WWII.
"Wherever is this?" said Peter's voice, sounding tired and pale in the darkness. (I hope you know what I mean by a voice sounding pale.)
In context, pale would be defined as weak.
Because he wants Turkish delights