The federal judge ruled that claims that nearby graves were at risk of damage were “misinformed or misleading.” The memorial has been criticized for its sanitized depiction of slavery.
The short, unpublished letter had been in the same private collection for at least a century before it was acquired by the Raab Collection in Pennsylvania earlier this year.
A Chinese balloon seen floating over the northwestern United States this week was a reminder of how governments have used balloons for reconnaissance for more than a century.