SpoilerThe cause of the fire was never determined. Some put it down to simple mischance, whilst others muttered that Black Harren’s seat was cursed and brought only doom to any man who held it. Many suspected the blaze was set intentionally. Mushroom suggests that the Sea Snake was behind it, as an act of vengeance against the man who had cuckolded his son. Septon Eustace, more plausibly, suspects Prince Daemon, removing a rival for Princess Rhaenyra’s affections. Others have put forth the notion that Larys Clubfoot might have been responsible; with his father and elder brother dead, Larys Strong became the Lord of Harrenhal. The most disturbing possibility was advanced by none other than Grand Maester Mellos, who muses that the king himself might have given the command. If Viserys had come to accept that the rumors about the parentage of Rhaenyra’s children were true, he might well have wished to remove the man who had dishonored his daughter, lest he somehow reveal the bastardy of her sons. Were that so, Lyonel Strong’s death was an unfortunate accident, for his lordship’s decision to see his son back to Harrenhal had been unforeseen.