(Lines 509-518) Why was the general bored by the hunt last night?

After Rainsford spends a sleepless night in General Zaroff's chateau, he joins the general for lunch the next day. When the general arrives for lunch, he inquires about Rainsford's health and says that he is worried. The general explains to Rainsford that he is becoming bored with hunting again because his prey is not challenging enough. General Zaroff tells Rainsford that the previous night's hunt was not exhilarating or fun because the man he was chasing lost his mind. The general says that the sailor made a straight trail through the forest and could not navigate the island, which resulted in a boring hunt. General Zaroff believes that the sailors have dull minds and finds it more annoying than satisfying to hunt someone who cannot challenge his abilities. After listening to the general lament about his boring hunting experience the previous night, Rainsford asks to leave the island. Unfortunately, General Zaroff dismisses his request and ends up hunting Rainsford for the next three days.