William Still, The Underground Rail Road (Philadelphia: Porter & Coates, 1872), 757-758.
About the year 1853, Maryland, her native State, had enacted a law forbidding free people of color from the North from coming into the State on pain of being imprisoned and sold into slavery. A free man, who had unwittingly violated this infamous statute, had recently been sold to Georgia, and had escaped thence by secreting himself behind the wheel-house of a boat bound northward; but before he reached the desired haven, he was discovered and remanded to slavery. It was reported that he died soon after from the effects of exposure and suffering. In a letter to a friend referring to this outrage, Mrs. Harper thus wrote: "Upon that grave I pledged myself to the Anti-Slavery cause."