That's why the only spirits I trust reside in wine cellars and charred oak casks.
"An acquaintance of mine wanted to consult a deceased uncle about some family business. He sought out a medium who summoned the spirit, but he soon grew suspicious at his uncle's ignorance of his earthly life, and asked whether he had died naturally or by a catastrophe. 'Natural death,' the ghost replied. Well, as a matter of fact, a cyclone had picked the old gentleman up, blown him three miles, and used him to knock down a tree sixty-five feet high. That's why the only spirits I trust reside in wine cellars and charred oak casks.
I cannot fully understand the last sentence in this paragraph. Anyone could help me explain it. Thanks in advance.