Twisden tells Dancy that after the court rose the day before that they had a man called Ricardos.
Ricardos accepted that Dancy had given his daughter on thousand pounds, who was a great friend of Dancy, as a settlement as Dancy married Mabel. Two notes of that amount were in possession of Twisden and were a clear evidence against Dancy. So, Twisden gave him some adviceto go to Morocco where a war was going on, since it would suit Dancy's reckless lifestyle. Also, Twiden told Dancy that he had lost his honour and he couldn't save his wife's peace of mind. So he better go.