1Rembrandt Peale to Thomas Jefferson, 13 July 1813 (Jefferson Papers)
In a Box of Books which general Armstrong presented to the Pennsylvania Academy of Fine-Arts there were packed up several articles belonging to himself which he requested me to take charge of, It was a long time after I had them before I remarked a small package for you, containing 3 Stones which you were desirous of possessing, accompanied with a letter from the gentleman who purchased them...