<b>More information from Genealogics:</b>
She was only ten when she married Edward of Westminster, who was fifteen, the eldest son and heir of Henry III, king of England. However, it seems the marriage was not consummated until she was about eighteen or nineteen. They had at least sixteen children of whom Edward II, their youngest, would succeed his father. Edward and three daughters would have progeny.
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 assassination attempt with a poisoned dagger in Palestine. 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. She followed Edward I at a much slower pace. When she reached Lincolnshire, she became feverish, and so she 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 crosses, 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.
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He was only fifteen when he went to Spain to be knighted by King Alfonso X of Castile and to marry that king's half-sister, Eleanor. This marriage, like that of his parents, was a happy one and produced fifteen children, of whom only six reached adulthood.