The Weeping Time: A History of the Largest American Slave Auction
theatlantic.com
theatlantic.com
https://archive.org/details/journalofresiden00kemb_0
and the eyewitness description of the sale, "Great Auction Sale of Slaves at Savannah, Georgia", is here:
The slaves were sold as family units, not individuals. But since Jeffrey was only engaged to Dorcas and not actually married, he was sold separately. To buy Dorcas the new owner would have had to buy her whole family since they were all sold together.
Family units only considered husband/wife and minor children. Older children and adult siblings or grandparents were separated from their relatives.
Or they could, you know, go back to Honduras and be murdered. Together.