author
d. 1841
An early 19th-century writer remembered for a juvenile life of George Washington, she wrote with a clear moral purpose and an eye toward making history engaging for young readers.

by Mary Clark
Mary Clark is identified by Project Gutenberg and the Internet Archive as an author who lived about 1792 to 1841. She is credited with The Early Life of Washington; Designed for the Instruction and Amusement of the Young, published in 1838.
That book presents George Washington's youth in a way meant to educate as well as entertain younger readers. The surviving catalog records available here do not offer many personal details about Clark herself, so her life story remains only lightly documented in the sources I could confirm.
Even so, her work reflects a familiar early American publishing tradition: short, improving biographies written to introduce major historical figures to children. Clark's known book suggests a writer interested in character, patriotism, and accessible storytelling.