42nd President.  Highly uncommon, great association, mailing envelope signed and addressed by Clinton at the very start of his college tenure at Georgetown University in Washington D.C.  The envelope features Clinton's return address in the top left corner:

Bill Clinton
Box 232
G.U.
Wash D.C.
20007

The center of the envelope is addressed to Clinton's grandmother in Hope, Arkansas:

Mrs. Edith Cassidy
c/o Hope Nursing Home
Hope, Arkansas

The envelope is postmarked November 8, 1964 in Washington D.C.  Clinton grew up under the care of his Grandmother in Hope, Arkansas making this a fantastic association Clinton autographed item