Final answer:
Sarah tells John that they will go together, indicating her commitment to join him and face any dangers together.
Step-by-step explanation:
In the context provided from the collection of excerpts, Sarah suggests to John that they should leave together amid the danger they are facing. The phrase, "Very well, dearest," he agreed, "we'll go together." encapsulates Sarah's desire to accompany John, indicating her decision to be with him and share in his dangers, reinforcing their bond and commitment to each other regardless of the circumstances they are confronted with.