She was only ten years of age when she married Edward of
          Westminster, who was fifteen years old and heir of the English king.
          However, it seems the marriage was not consummated until she was about
          eighteen or nineteen years old.
              They remained together almost all their lives and even went on
          crusade together. A story has it that she sucked the poison from
          Edward's arm after an assasination attempt with a poisoned dagger. Two
          of their children were born in the Holy Land.
              In 1290, Margaret of Scotland, "The Maid of Norway", died and
          Edward I hurried north leaving Eleanor behind as she was still weak
          from only just giving birth to her fifteenth child. She followed
          Edward I at a much slower pace and, when she reached Lincolnshire,
          became feverish and so went to Herdeby near Grantham. A messenger was
          sent to Edward I who hurried back, but Eleanor had died before he
          could reach her.
              Eleanor's body was taken back to London and, to express his grief,
          Edward erected a cross, twelve in all, wherever her body rested at
          night. Only three of the originals have survived at Geddington,
          Hardingstone and Waltham. Copies were created from those of Banbury
          and Charing Cross.

Source: Leo van de Pas