John Plowman was also involved in some of these land deals as well as having his own land deals. Stevenson was the best friend and had the same last name as Jonathan Plowman's mother. Stevenson did not arrive in America until 1734 at age 16 from Ireland. Ann Vickory Stevenson, Jonathan Plowman's mother, was born in England in 1690. There is a slight outside chance they would be related, but it can't be substantiated. Charitable works including donation of land for church Jonathan Plowman, a God-fearing man and devout Christian as most were in that time, donated land to establish a church near Baltimore. The Particular Baptist Gunpowder Church was established after the donation of this land on February 27, 1770. Jonathan Plowman conveyed to pastor John Davis, John Whitaker and Samuel Lane, Particular Baptists, a parcel of land, containing , for the sole use of a meeting house for the worship of God, forever. This fact was recounted in an act the state of Maryland passed on January 22, 1829 to incorporate Particular Baptist Gunpowder Church in Baltimore County. In the 1850s Jonathan Plowman's grandson Joshua Plowman member of Black Rock Particular Baptist Church was appointed as one of the trustees to oversee the sale of the land which Jonathan Plowman Jr. had donated to build the Particular Baptist Gunpowder Church. The church meeting house had fallen down and the congregation broken up and all the appointed trustees were dead. Maryland legislator approved an act to allow the take over by Black Rock Baptist Church the nearest church of the same faith to sell the property and use the funds from the sale for its own needs. On July 16, 1763, Plowman and others organized a lottery to raise 510 pounds for completing the market house, buy two fire engines and a parcel of land to enlarge the wharf and build a new one. In April 1767, Jonathan Plowman was part of a mission of mercy. French citizens living in the town of Fredrick town and having been neutral during the French and Indian War now found themselves persecuted by their British neighbors. The 200 men, women and mostly children wanted to leave for French settlements on the Mississippi River. They did not have the means to pay for the trip. The ships Virgin and Pocomoke owned by Jonathan Plowman and Peter Hulbert were used on the voyage to