ï»¿Over the next half-dozen years, Keys assembled a chain of observations that became the bedrock of his belief that fat caused heart disease. He fed high-fat and medium-fat diets to schizophrenic patients at a local mental hospital and reported that the fat content dramatically raised cholesterol. He traveled to South Africa, Sardinia, and Bologna, where Margaret measured cholesterol and they assessed the fat content of the local diet. In Japan, they measured the cholesterol levels of rural fisherman and farmers; they did the same for Japanese immigrants living in Honolulu and Los Angeles. He concluded that the cholesterol/heart-disease association was not peculiar to race or nationality, not a genetic problem, but a dietary one. They visited a remote logging camp in Finland and learned that these hardworking men were plagued by heart disease. A local clinic had six patients, including three young men, who“suffered from myocardial infarction.” They shared a snack with the loggers: “slabs of cheese the size of a slice of bread on which they smeared butter,” Keys wrote; “they washed it down with beer. It was an object lesson for the coronary problem.” Buy Voltaren now and save 20% Brock, Samuel, ref 1 The most constant patterns (perfectly visible with both eyes open, and especially so if my visual field is otherwise blank) are sticklike or occasionally curved patterns resembling letters or numbers. Occasionally I recognize a 7 or a Y or a T or a delta, but for the most part they are unintelligible, like runes. They make me think of a child’s letter box, with letters spilled out at random and at all angles. These are rather faint and often have double lines, giving the impression of being incised like the lettering on a stone. These pseudo-letters and pseudo-numbers often flicker and form, dissolve and reform in fractions of a second, all over my visual field. Sometimes, if I am looking at a horizontal segment of a wall, the runes come in a row, like a frieze.