Elizabeth was sent to Miss Byerleys school in Barford Warwickshire in 1821 at the age of 20. Three years later, she, with her school, moved to Stratford-upon-Avon. This school later appeared in two of her novels, Lois the Witch, and My Lady Ludlow.

https://gaskellblog.wordpress.com/2010/10/20/elizabethgaskell-bio/