The Citadel is an archive of information for George R.R. Martin's A Song of Ice and Fire.
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[Note: Proofread for clarity. This is in response to a question regarding whether Brandon's duel with Littlefinger was before or after Harrenhal.]
And when I asked him your question, Ran, about Brandon, he said he couldn't be 100% sure without checking his notes but he thought it was after Harrenhal.
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