Complex sentence: Though the Westons were not wealthy, they were well connected and through her uncle's patronage Weston was educated in England, where she lived until she returned to Boston in 1828, to serve as principal of a newly founded and socially progressive girls high school.
Split into simpler sentences: Though the Westons were not wealthy, they were well connected and through her uncle's patronage Weston was educated in England and lived there for a time. She returned to Boston in 1828 to serve as principal of a newly founded and socially progressive girls high school.