(Thought I'd pinch this idea from Misfit!)
Local legend says the bluebells mark the blood of Norman soldiers--
I'm at Rannerdale
(originally probably "Ragnar's dale") in the Cumbrian Lakeland District, in the midst of a bloody battle between Ranulph le Meschin's Normans and Cumbrian/Norse resistance fighters led by Jarl Buthar. It's sometime early in the 12th century--
Amazingly, although most people have heard of Hereward the Wake, Jarl Boethar/Buthar is virtually unknown, yet for thirty odd years from the Harrying of the North in 1069 to the early 12th century, this Norse chieftain and his band of disaffected native Cumbrians and Anglo-Scandinavians conducted a campaign of running resistance against the Norman invaders from a hidden stronghold in the fells around Buttermere (which takes his name in a corrupted form)
I hadn't realised the extent to which the Vikings occupied this area from the ninth and tenth centuries; with all those Viking genes it's no wonder the Borderers developed such a fearsome reputation!
Reading: Rosemary Sutcliff's "Shield Ring"