The descendants of enslaved potter David Drake have criticized the Philadelphia Museum of Art after they asked it to return one of his works.
Drake, also known as Dave the Potter, often wrote verse on his pots at a time when it was illegal for him to read and write and surviving works sell for tens of thousands of dollars.
Other institutions including Boston's Museum of Fine Arts and artist Theaster Gates have returned works to the family already.
George Fatheree, a lawyer working for the family, said conversations with the museum were "cordial in tone, but noncommittal" and said the museum had not indicated if it intended to return the work.
A spokesperson for the museum, led by director Daniel Weiss, said its next steps were still under discussion, telling the Philadelphia Inquirer newspaper that at "this time, we are not able to discuss any further details."