The illustration depicted 150 cats, many of which resembled Peter, doing things such as sending invitations, holding a ball, playing games, and making speeches, spread over eleven panels.
Pildil oli kujutatud 150 kassi, kellest mitmed sarnanesid Peteriga, saatmas kutseid, hoidmas palli, mängimas mänge, pidamas kõnesid ja tegemas palju muudki.