I associated it [the word 'Hourloupe', as title of his longest series of work he made exclusively from 1962 to 1974] by assonance with 'hurler' (to shout), hululer (to howl), loup, (wolf), 'Riquet à la Houppe' and the title of Maupassant's book 'Le Horla', inspired by mental distraction.

Biographie au pas de course, in Prospectus et tous écrits suivants, Vol. IV, Jean Dubuffet, Gallimard, Paris 1995, p. 510