“Sitting by Night in my secret Study / Alone, resting upon the Brazen Stool, / A slight flame breaking forth out of that solitude, / Makes me utter what is not in vain to believe.”
The hint
Line, word, letter.
The cipher
1.6.3 · 3.4.4 · 1.3.1 · 1.7.4 · 2.6.5 · 1.6.2
— Nostradamus · The Prophecies, I.1 · 1555
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