Another two books of poetry: "Studium przedmiotu" ("Study of the Object") and "Napis" ("Inscription") were published in 1961 and 1969. In 1974 the main character from another book of poetry "Pan Cogito" ("Mr. Cogito") appeared in the Polish culture. The character of Pan Cogito appeared also in the later works of the author. The poet always liked to use the lyric of role (in which the lyrical persona cannot be identified with the author), multistage irony – the character introduced for good favored the game conducted by the author, between him and the reader.