What was Juan Thomas advice to Kino with regards to selling the pearl

Before leaving to sell the pearl, Juan Tomas warns Kino and Juana to get the best price for the pearl, and tells him how their ancestors got an agent to sell their pearls, but this agent ran off with the pearls. Kino had heard the story told as a warning of punishment against those who try to leave their station.

explanation:

the silver bells of the sleds are merry and keep time in the winter nights while the sky twinkles happily. the golden bells of weddings are delightful in their peaceful happiness, foretelling a rapturous future. meanwhile, the brazen alarm bells scream frightfully in the night, with a discordant and desperate sound. in their clamor, these bells convey terror, horror, and anger. finally, the iron bells are solemn and melancholy, while those in the church steeple are like ghouls who feel happiness. the king of the ghouls, who rings the bells, cheerfully keeps time with the moaning and groaning bells.