So I #amReading#ATaleOfTwoCities again and this is near the end but
"These words are formed by the rusty iron point with which I write with difficulty in scrapings of soot and charcoal from the chimney, mixed with blood, in the last month of the tenth year of my captivity."
So did Dr. Manette write a message with his own blood because he needed a coagulating liquid or for the DRAMA 馃拃 #CharlesDickens