In the beginning of Chapter 3, Jack begins his metamorphosis from school boy into primitive, savage hunter. First, his appearance is described.
"A sharpened stick about five feet long trailed from his right hand, and except for a pair of tattered shorts held up by his knife-belt he was naked." (Golding, p. 48)
"Jack stood there, streaming with sweat, streaked with brown earth, stained by all the vicissitudes of a day's hunting." (Golding, p.49)
At the beginning of Chapter 3, he does not succeed in killing a pig, this initial failure only serves to make Jack become more determined and more savage in his hunting.
He emerges from the forest, distant and detached from the other boys. Singularly focused on the hunt, his behavior becomes more uncivilized.
"Jack took up a coconut shell that brimmed with fresh water. The water splashed over his chin and neck and chest. He breathed noisily when he had finished." (Golding, pg. 50)