@fotogruber@pixelfed.de Yeah I saw that statement. Here is a response from Rev Amos Brown who had loaned several artifacts:

Civil rights activist Rev. Amos Brown says he was recently notified two of the artifacts he loaned to the museum would be returned back to him. Brown said he lent the artifacts to the Smithsonian in 2016. He said the museum always gave him the option of donating the books permanently or renewing the loan, but this time he wasn't asked.