He served as a member of the Maryland House of Delegates, representing Harford County in 1813, from 1818 to 1820 and from 1836 to 1838.

[2] Maulsby volunteered and helped defend Baltimore at the Battle of North Point during the War of 1812.

[2] Maulsby served as president of the governor's council during Charles Goldsborough's term in office.

[2] Maulsby served as a member of the Maryland House of Delegates, representing Harford County in 1813, from 1818 to 1820 and from 1836 to 1838.

They had fifteen children, including Margaret M., John Hall, Israel David, Eleanor, Benjamin, William Pinkney, Sarah Jane, Hannah Elizabeth, Mary Cordelia, Harriet Belinda, Charles Hall, Israel Thomas, Charlotte Emily and Anne.