The marriage takes place, and Mrs Sieppe, along with the rest of Trina's family, move away from San Francisco, leaving her alone with McTeague. Trina proves to be a parsimonious wife; she refuses to touch the principal of her $15,000, which she invests with her uncle. She insists that she and McTeague must live on the earnings from McTeague's dental practice, the small income from the $15,000 investment, and the bit of money she earns from carving small wooden figures of Noah's animals and his Ark for sale in her uncle's shop. Secretly, she accumulates penny-pinched savings in a locked trunk. Though the couple are happy, the friendship between Marcus and Mac deteriorates. More than once the two men come to grips; each time McTeague's immense physical strength prevails, and eventually he breaks Marcus' arm in a fight. When Marcus recovers, he goes south, intending to become a rancher; before he leaves, he visits the McTeagues, and he and Mac part apparently as friends.