The Remington Ancestry Chart by Boyd Scott Remington has the date of marriage as 13 June 1710, and location as Kittery, Maine. Unfortunately, no source is noted. The online genealogy of Ann M. Mcallister (at genealogy.com) has their marriage on 13 June 1712 at Old Eliot (now Kittery), Maine, as does the Remington genealogy compiled by Lois Remington Smith.
John was killed by his mother "in distraction" when he was 3 months old. Elizabeth was brought to trial but found not guilty, being supposed delirious at the time.