Cover ornamented with rubber stamp in purple ink: circular seal design with pigs at center, "HEMI" (HEnning MIttendorf), "50 BIRTHDAY 50", "3.3.38", and "3.3.88". Rubber stamp in green ink: circular seal design with ship on sea against starry sky at center, and "WHERE LEADS THE VOYAGE . . .". Rubber stamps in blue ink: "AS LONG AS LIFE CONTINUES I AM ADDICTED TO pARTners' CORRESPONDING EXPRESSIONS ON THE ENCLOSED SHEET. PLEASE INTERFERE (ONCE MORE) OR PASS ON! THANKS!", and sender's return address. Rubber stamp in red ink: "DEADLINE 15.2.1988". A$ sheet enclosed. Blank sheet ornamented with rubber stamps from cover, and rubber stamp in yellow ink: "PLEASE EXPRESS YOURSELF HERE + SEND BACK TO:". A4 sheet enclosed. Advertisement for a mail art show organized by Mittendorf in Eeklo, Belgium. Includes list of participants in handwritten style. A4 sheet enclosed. Additional poster for Eeklo exhibition, titled "WHERE DO YOU FIND ENCOURAGEMENT?" Occult themed design with exhibition details rather than list of participants.