It's now the winter of 1877, and Susan's dream of a cement empire is officially dead. Oliver is off in North Dakota performing a survey for mega-rich businessman George Hearst. While he's out there, Susan will be staying back at home on the East Coast.
Meanwhile, Susan has had to let go of Lizzie and Marian Prouse, which bums her out to no end. Luckily, both of them get married and live happily ever after, so no sweat.
Although she arrives in New York late at night, Susan is so upset that she just bolts out of the train with the baby. One ferry ride later, and she's back home with her "loving" family (3.6.23).
But, Susan is most excited to see Augusta. After she mentions this to her mother, she receives some awful news—Thomas is sick. Even worse, he and Augusta left town just last week to recover elsewhere.