De Morgan, Evelyn (1855-1919)
Rosamund was the mistress of Henry II, who built a house for her at Woodstock in Oxfordshire. Legends say that he tried to keep her safe by installing her in a house called Labyrinthus, which was in effect a maze. But Queen Eleanor found her way through by using a thread and poisoned her.
This legend makes an attractive picture, but is contradicted by historic fact. Henry imprisoned Queen Eleanor from 1174–1189 for supporting the rebellion of two of her sons against their father. Rosamund entered a nunnery in 1174 or 1176 and died there in 1176. At the time of Rosamund‘s death, Queen Eleanor was a prisoner in Winchester. (De Morgan Foundation)