There are three girls named Fort in the rolls of the Mordecai school that I assembled in the early 1990s:
Charlotte Fort attended the school in both sessions of 1811.
Mary Ann Fort attended the school for three years, from early 1816 until the end of 1818. She was from Hicksford (now Emporia), Virginia, with Lewis Fort as the adult name on her account. She married in 1821.
Martha (or Patsy) Fort attended the school for two years, from early 1810 to the end of 1811.
Mary Ann Fort Mason (1803-1870) I was able to learn about in the early 1990s, because she married someone fairly prominent, and because she was at the school long enough to be mentioned in the Mordecai letters. Rachel Mordecai called her parents (Lewis Fort and Eliza Harris Coleman Fort) "quite diverting people" and noted that her mother wrote "droll letters". Her planter family held slaves. At age 18, in 1821, she married John Young Mason, whose sister was a Mordecai student. They had at least eight children together, and her husband became a congressman, and an ambassador, and Secretary of the Navy, and Attorney General of the United States--so she was a busy political wife, until he died in 1859, in Paris. At least one of her sons (Simon Blount Mason) served in the Confederate army during the Civil War. She died in 1870, in Virginia.
Now what can some online searching reveal about the other two Fort girls? Charlotte Ann Fort married John S. Gorman in Wake County, North Carolina in 1818--the age/timing is exactly right for that to be the Mordecai student. AND she had a sister Martha Fort. Aha! So we have them.
Charlotte Ann Fort Gorman (1802-1883), daughter of James Fort and Chloe Powell Fort, married John Spear Gorman in Wake County in 1818. They had at least one child, Annie, in 1832. Charlotte was widowed when J. S. Gorman died in 1836. She died in 1883, aged 81 years.
Martha W. Fort Andrews (1797-1876) was Charlotte's older sister. She married Cullen Andrews Jr. in Wake County in 1816, and they had ten children born between 1817 and 1837. The Andrews family lived in Tennessee, Mississippi and Alabama. Her husband died in Texas in 1857. Martha Fort Andrews died in 1876, aged 79, in Columbus, Mississippi.
All three Fort girls were Southern widows in their 60s when they lived through the American Civil War.