The quote "There's only one thing left to do. St. Paul's on Old Year's Night. For Auld Lang Syne, my dears. For old time's sake." reflects a sense of nostalgia and the importance of tradition as the year comes to a close. It suggests a gathering at St. Paul's Cathedral to celebrate the transition into the New Year, emphasizing the value of remembering past connections and experiences shared with loved ones.

In the context of Jacqueline Winspear's novel "Among the Mad," this moment captures the essence of reflection and the bittersweet nature of time passing. The phrase signifies a collective farewell to the old year while simultaneously honoring the relationships that have shaped our lives. It evokes a strong emotional response and resonates with the idea that as we move forward, it is essential to cherish those memories.