Complex sentence: He worked from 1795 to 1845 as a silversmith in Newburyport MA in addition to ssupplying well-crafted church silver and other vessels, he made jewelry in his shop on Merrimack Street.
Split into simpler sentences: He worked from 1795 to 1845 as a silversmith in Newburyport, MA. In addition to supplying well-crafted church silver and other vessels, he made jewelry in his shop on Merrimack Street.