 Among these included Robert Grosseteste, Bishop of Lincoln, the most significant intellectual in England at the time who recognised Margaret's position as Countess of Lincoln to be legitimate and important, and he viewed Margaret as both patron and peer.He dedicated "Les Reules Seynt Robert", his treatise on estate and household management, to her.Margaret died in 1266, and left her estates to her grandson, Henry de Lacy, Earl of Lincoln.