Mary Wollstonecraft Shelly By facebooker_1015693228 Sep 25, 1797 11 days after her birth her mother die. Period: Sep 25, 1797 to Sep 25, 1851 Mary W shelley May 5, 1814 She meets Percy. they run away together. Sep 25, 1814 She gives birth, first time at age 17. she had 5 children, but only one of them survived into adulthood.