He served as a member of the Maryland House of Delegates, representing Harford County from 1884 to 1888.
[2] During the Civil War, Plowman served in the Union Army as a quartermaster's clerk.
[1][2] He served as a member of the Maryland House of Delegates, representing Harford County from 1884 to 1888.
[3] In 1887, Plowman was appointed by Governor Elihu Emory Jackson as commander of the Maryland Oyster Navy.
They had one daughter, Ida C.[1][2] He was a member of the Presbyterian Church, as well as the Masons and Odd Fellows.