The Lee children and the slaves began their education in the school and sewing room. Mrs. Custis, and later Mrs. Lee, held lessons for the slaves in preparation for their eventual freedom. Mrs. Custis persuaded her husband to include a provision for the emancipation of his slaves in his will, just as George Washington had done. Workers discovered the globe in the attic in the 1920s; it has never left the estate.”
Arlington House, The Robert E. Lee Memorial