Now I'm going to tell you what happened in chapter 13 very fast.
White Witch bound the Edmund in dark valley. Edmund was forget that he is hungry and thirsty. The Witch and the dwarf were talking close beside Edmund in low tones. Then the wolfs come back and said that one of the sons of Adam killed my captain, Maugrim. Then Witch was very angry and commanded to summon all our people to meet as speedily as they can. Then Edmund heard sound like whizzz whizz whizzz and he realized that sound is of a knife being sharpened. And at this moment he heard another sounds- a drumming of hoofs and a beating of wings- a scream from Witch. Then he felt that strong arms were round him. Then he heard voices of people they was talking about that little battle in there. When they was in the camp the Aslan and Edmund had a little conversation and then Edmund said sorry for his sisters and brother. Then Aslan came to the stone table to met with Witch and they talked about different topics and one was about deep magic. They talked how the Emperor put into narnia deep magic at the first beginning. But suddenly there was no sound any more like you could hear all things. In conversations end the Aslan roared as hard as he could and as loud as he could the Witch scared ran away.