"'Of course she will like us ... We are nice'" "'I am loud and pesky,' Caleb suddenly cried.
Here, Caleb is worrying if Sarah likes him. In the beginning he says that Sarah will like him and Anna because they are nice, but then in the end he says he is "loud and pesky." This is ironic for him to say he's nice and Sarah will like him then to say he's "loud and pesky" and Sarah won't like him. But it is understandable because Caleb is at first excited for Sarah to come and believes that she will like him. But then when she goes to town alone, he thinks that she is going to board a train and leave him and his sister and father because he is annoying and loud.
"Caleb burst into tears. 'Seal was very worried!' he cried."
Here Caleb was crying and said that Seal, Sarah's cat, was worried when Sarah went to town. However Seal is not there, rubbing against Sarah's leg as though he's worried, but rather Caleb is there crying into Sarah's dress. Caleb is the worried one, so it is ironic that Caleb is saying that Seal is worried, when clearly he is the worried one.
"'Hush up Caleb,' I said crossly. 'Hush up.' ... And Caleb began to cry, and I took him inside where we could both cry."
Here Anna is cross with Caleb for asking questions about where Sarah is and why she has gone to town alone. Anna is getting cross and tells him to be quiet, but then the next minute, she is crying also and is worried about where Sarah is and what she's doing. This is ironic for her to be cross with Caleb for something, then to do the same thing as Caleb is doing.
