Complex sentence: He then abandoned plans to become a priest and moved to Stockholm in 1840 as Scott's assistant in the evangelism business that same year had his own room near Haymarket Square in the so-called Church of England.
Split into simpler sentences: He then abandoned plans to become a priest and moved to Stockholm in 1840 as Scott's assistant in the evangelism business. That same year, he had his own room near Haymarket Square in the so-called Church of England.