Eric is the boy who shares the scene in the end of Chapter 10 with Ralph and Piggy. There has been a fight; both Eric and Ralph think that they have been battling someone trying to steal the conch. Neither boy realizes they had been fighting one another, and they *still* don't put it together as they describe to one another their battle wounds:
"I gave one of 'en what for," said Ralph, "I smashed him up all right. He won't want to come and fight us again in a hurry."
"So did I," said Eric. "When I woke up one was kicking me in the face. I got an awful bloody face, I think, Ralph. But I did him in the end."
"What did you do?"
"I got my knee up," said Eric with simple pride, "and I hit him with it in the pills. You should have heard him holler!...
Ralph moved suddenly in the dark; but then he heard Eric working at his mouth. "What's the matter?"
"Jus' a tooth lose."