I spent yesterday's failing daylight at spooky Hopton Castle, not knowing about its grim historical massacre of the English Civil War. But I liche-d its fascinating mutualisms from a spectrum of ages, for sure! I only hope someone documented them before large-scale renovations. Species may have been present for at least a thousand years. #lichens #lichenification #LichenSubscribe #nature #castles #geology #MastoLichen