This is shown by hundreds of advertisements in southern papers, like the following:
From the "Mobile Register," July 21. 1837. "WILL BE SOLD CHEAP FOR CASH, in front of the Court House of Mobile County, on the 22d day of July next, one mulatto man named HENRY HALL, WHO SAYS HE IS FREE; his owner or owners, if any, having failed to demand him, he is to be sold according to the statute in such cases made and provided, to pay Jail fees.
WM. MAGEE, Sh'ff M.C."
From the "Grand Gulf (Miss.) Advertiser," Dec. 7, 1838.
"COMMITTED to the jail of Chickasaw Co. Edmund, Martha, John and Louisa; the man 50, the woman 35, John 3 years old, and Louisa 14 months. They say they are FREE and were decoyed to this state."
The "Southern Argus," of July 25, 1837, contains the following.
"RANAWAY from my plantation, a negro boy named William. Said boy was taken up by Thomas Walton, and says he was free, and that his parents live near Shawneetown, Illinois, and that he was taken from that place in July 1836; says his father's name is William, and his mother's Sally Brown, and that they moved from Fredericksburg, Virginia. I will give twenty dollars to any person who will deliver said boy to me or Col. Byrn, Columbus. SAMUEL H. BYRN"
The first of the following advertisements was a standing one, in the "Vicksburg Register," from Dec. 1835 till Aug. 1836. The second advertises the same FREE man for sale.
"SHERIFF'S SALE" "COMMITTED, to the jail of Warren county, as a Runaway, on the 23d inst. a Negro man, who calls himself John J. Robinson; says that he is free, says that he kept a baker's shop in Columbus, Miss. and that he peddled through the Chickasaw nation to Pontotoc, and came to Memphis, where he sold his horse, took water, and came to this place. The owner of said boy is requested to come forward, prove property, pay charges, and take him away, or he will be dealt with as the law directs.
WM. EVERETT, Jailer.
Dec. 24, 1835"