a voice from the past, a message in a bottle. like someone else's marginalia in second-hand books: the best reason to buy them.
Steel is classified as iron that has .2 to 2.1% carbon by weight. Cast Iron is classified as iron that has 2.1% to ~4% carbon by weight.
Off topic, but I'm enjoying "The Secret History," which I hear you read 15 TIMES. Michelle recommended. Masterful storytelling so far (bout halfway through). Real distinctive voice, smart, eloquent.