Mark Ramsey (d. 1858) was the elder son of Molly Horniblow. When their mistress Elizabeth Horniblow died in 1827, it was generally known that she intended Molly to be set free, but she, Mark, and her grandson John Jacobs were put up for sale. Molly was well-regarded, and owing to public disapproval, people would not bid on her. She had saved some money over the years, and given it to Hannah Pritchard, who used it to buy both Molly and Mark. Molly was set free, and opened a bakery shop.
Mark was technically his mother's slave, since she had to have a certain amount of property in order to be free. Mark helped Molly hide his niece, Harriet Jacobs, and assisted her in finally fleeing north. Molly began legal proceedings in 1842 to be allowed to free her son, especially since he was her only heir. She eventually succeeded, Mark was able to legally marry and inherit from his mother after her death in 1853, and he and his wife Ann lived in Molly's house until his death in 1858.