Two of these cards are available, different from the others.  Each one is personally autographed on the front.  The reverses are conventionally printed as postcards.  One was not mailed (Grade: 1, $8) and the other was mailed in 1958 with a 3-cent stamp and full postmark (Grade: 1, $14).  At the time, we were extraordinarily grateful for these.  And we still are.  Thanks, Ned.