“I remember once I asked Maester Luwin why he wore a chain around his throat.” Maester Aemon touched his own collar lightly, his bony, wrinkled finger stroking the heavy metal links. “Go on.” “He told me that a maester’s collar is made of chain to remind him that he is sworn to serve,” Jon said, remembering. “I asked why each link was a different metal. A silver chain would look much finer with his grey robes, I said. Maester Luwin laughed. A maester forges his chain with study, he told me. The different metals are each a different kind of learning, gold for the study of money and accounts,
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