Cover ornamented with rubber stamps in blue ink: circular seal design with "WHERE DO YOU FIND ENCOURAGEMENT", "EXPRESS IT TO ME!", and "HEMI" (HEnning MIttendorf), sender's return address, and "DenK-ART". A3 sheet enclosed. Yellow paper. Poster for an international mail art exhibition organised by Mittendorf, titled "IF STILL ALIVE EXPRESS IT TO ME!" Includes list of participants in handwritten style.