Elizabeth was born about 1778 (see research notes).
She married John Penson at Stone in Staffordshire on Christmas eve 1797. She was 21. 
Her age was given as 21 when she married at the end of 1797 which would make her birth year 1776.
↑ "England, Staffordshire, Church Records, 1538-1944," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QLQB-B8XZ : accessed 14 June 2020), John Penson and Elizabeth Stanley, ; citing Marriage License, Stone, Staffordshire, England, United Kingdom, Staffordshire & Stoke on Trent Archive Service, Stafford; FHL microfilm 7,619,265.