On October 1, the day after Crispin left, Cynthia got conflicting stories from her uncles, Joseph left, and Gregory drank himself into a fever.  On October 2, Gregory confessed to Cynthia, and Crispin came to her late that day; they then concerted their departure for the next evening.

There is a bit of confusion in the text.  For example, on the day before their flight Cynthia tells Crispin that Joseph "had set out four days ago for London" [Chapter XXIV], when in fact he left only yesterday.