Complex sentence: When she first arrived in Mandarin, from 1868 to 1870, religious services were held in the Stowes' home, with Calvin presiding and Stowe teaching Sunday School to both black and white children and sometimes serving as an acolyte during services.
Split into simpler sentences: When she first arrived in Mandarin, from 1868 to 1870, religious services were held in the Stowes' home, with Calvin presiding. Stowe taught Sunday School to both black and white children and sometimes served as an acolyte during services.