Quoting the caption, “Woodlawn, completed in 1805, was part of George Washington’s Mount Vernon estate (and) was a wedding gift of General Washington to Nelly Custis, his adopted daughter, when she married his nephew.”  They spelled Nelly’s name differently on the front and the back.  Linen card mailed in 1958, of which one stamp remains, along with the postmark.   Grade: 4