Emilio Jacinto (Emilio Dizon Jacinto)—also known in the Katipunan as Pinkian and Dimas-Ilaw—wrote Liwanag at Dilim out of the same revolutionary world that made him, in Nicanor G. Tiongson’s phrase, the “Brains of the Katipunan”: a Tondo-born essayist and poet (15 December 1875–6 April 1899) who joined the Katipunan in 1893, served as Bonifacio’s counsellor,…