From the Washington (D.C.) City Gazette of Aug. 10, 1821:
In paring off the rising ground for the purpose of graduation, on the avenue, in front of the President's house, the labourers came to a spot where five graves were opened. One of the coffins was in perfect preservation, and the remains of a corpse was exposed exhibiting long dark hair, perfectly strong and neatly folded up under the scull. It is said to have been the burying ground of the Peerce family of Bladensburg, and that the bodies have been interred about forty years. Their remains were gathered together, and put into a coffin for re-interment.