Made in Italy

"If there's any doubt about the matter, he is," returned the doctor. "A man who has been three years biting his nails on a desert island, Jim, can't expect to appear as sane as you or me. It doesn't lie in human nature. Was it cheese you said he had a fancy for?"

"Yes, sir, cheese," I answered.

"Well, Jim," says he, "just see the good that comes of being dainty in your food. You've seen my snuff-box, haven't you? And you never saw me take snuff, the reason being that in my snuff-box I carry a piece of Parmesan cheese--a cheese made in Italy, very nutritious. Well, that's for Ben Gunn!"

Treasure Island by Robert Louis Stevenson