 He also published the collections "Enkelvoud" (1991), "Schoolslag" (1994) and "Vingerafdrukken" (1997).His essays on poetry were collected and published as "Over de troost van pessimisme" (1983), "De flaptekstlezer" (1992) and "Intimiteit onder de melkweg" (1994).De Coninck was also a prolific letter-writer, keeping the letters he received and making copies of all the letters he sent.