Manuel is a guy who works on the ranch. Buck trusted Manuel until Manuel took him to a "walk" then sold him to the man with the red sweater.
Curls death affects Buck. Spitz laughs during Curls's death. She was being attacked for her friendliness.
Buck and Spitz got in a fight. The other dogs saw how Buck beat up Spitz until he died.
Buck was been on the train for 2 days. He learns that he is not a alpha. He had not ate or drank for three days.
John Thorton almost drowns but keeps his hand on the rock to save himself. He tells to go back and get a rope to save him. John Thorton thinks before he does it and also knows that Buck is very capable.
Francois has to say goodbye to buck but, he feels bad because he has owner that can protect him. He leaves for the government.