Context for Record Type: Bills of sale are written agreements which convey title of property, including enslaved people, from seller to buyer. Under the system of chattel slavery, laws permitted enslavers to treat enslaved people as personal possessions in the same manner as livestock, farm equipment, or household items. Enslaved people could be bought or sold without regard to their personal relationships or free will. Bills of sale record the name of the seller, the names of enslaved people being sold and their price, and the name of the buyer. Given that they involved a property transaction, bills of sale were commonly recorded and filed with deeds in the local court. However, there was no official requirement that the transfer of an enslaved person be recorded unless necessary for legal purposes such as a court case or an estate settlement. Enslaved people could also be transferred through a deed of gift, there was no money transaction involved in this case, which distinguishes this record from a bill of sale. Enslavers and their family members often transferred enslaved people between themselves in this manner.

Deeds are written agreements which convey title of property, such as an enslaved person, from one individual to another. These include the voluntary transfer of enslaved people between family members with no financial transaction involved. Deeds include the names of the grantors, grantees, and enslaved people. Clerks proved, acknowledged, and recorded deeds in the local court.

Locality History: Arlington County was originally named Alexandria County. It was formed from a portion of Fairfax County that Virginia in 1789 ceded to the federal government for use as the site of a new national capital. In 1801 the area officially became part of the District of Columbia, although Congress named it Alexandria County. By an act of 9 July 1846, Congress returned the county to Virginia, and the General Assembly extended the commonwealth's jurisdiction over the region effective 20 March 1847. By an act of assembly passed 16 March 1920, the county's name was changed to Arlington, the name of the Custis family mansion (the home of Robert E. Lee), which is located in the county. An urban county, Arlington contains no incorporated towns or cities. The county courthouse is in the county.