In 1816 his wife Sarah died, although the cause is unrecorded. Evans remarried two years later in April 1818 to Hetty Ward, who was many years his junior and the daughter of the New York innkeeper. In these last years Evans lived in New York with his new wife. In early 1819 Evans developed an inflammation of the lungs and after a month of illness, died on April 15, 1819. Just four days prior, on April 11, news had reached him in New York that the Mars Works in Philadelphia had burned down, though his sons-in-law were committed to re-establishing the business and did so further outside of the city. Evans was buried at Zion Episcopal Church in Manhattan, but when that church was sold his body was moved several times until finally resting in 1890 in an unmarked common grave at Trinity Cemetery, Broadway at 157th Street, New York City.Oliver Evans burial sites "April 15, 1819: Oliver Evans, Delaware inventor, died in New York and was buried at Zion Episcopal Church near the Bowery on lower Manhattan." Accessed on May 11, 2008.
