8.5x11” folded as mailed letter. Dated Apr. 12, 1968 (eight days after MLK's death) on U.S. State Senate stationery. Addressed to individual at a Baltimore high school. Content reads “Thank You For Your Recent Letter And Kind Invitation. As You Know, My Brother, The Junior Senator From New York, Has Announced His Candidacy For President Of The United States And I Expect To Be Actively Involved In That Effort. Because Of This, It Would Be Most Difficult For Me To Make Any Firm Commitments On My Calendar, But I Do Appreciate Your Thoughtfulness In Extending The Invitation To Me. With Best Wishes. Sincerely, Edward M. Kennedy.” Signature is likely autopen. Comes with original envelope postally cancelled April 12, 1968. Lt. handling wear to envelope. Letter Exc.