Read it through once

As Ichabod approached this fearful tree, he began to whistle; he thought his whistle was answered; it was but a blast sweeping sharply through the dry branches. As he approached a little nearer, he thought he saw something white, hanging in the midst of the tree: he paused and ceased whistling but, on looking more narrowly, perceived that it was a place where the tree had been scathed by lightning, and the white wood laid bare. Suddenly he heard a groan--his teeth chattered, and his knees smote against the saddle: it was but the rubbing of one huge bough upon another, as they were swayed about by the breeze. He passed the tree in safety, but new perils lay before him.