Nothing is written on the reverse of this document. The exact date of the document cannot be determined, but the Old English penmanship, the watermark, ink, and language suggest the document dates from about 1740-1750. The penmanship has a hint of Old Dutch style.
This letter is not likely about an enslaved person. It is most likely a letter about an indentured servant, but we do not know the identity of the person considered for sale.