Final answer:
Jacob is tricked by one of the old servants, and the phrase 'what goes around comes around' reflects the consequences of Jacob's past actions.
Step-by-step explanation:
In the given scenario, Jacob is tricked by one of the old servants who used to wait on him when he stayed there. The servant was a prisoner but escaped a few days ago and asked to see Jacob before leaving. Jacob's lack of knowledge about the servant's name and his mention as a shadow or phantom suggests that Jacob was deceived or tricked by the servant.
The phrase 'what goes around comes around' fits into this scenario as a reflection of the consequences of Jacob's previous actions. It implies that Jacob may have treated the servant poorly or caused harm in the past, and now he is facing the consequences as the servant tricks him.