 The motif may have been borrowed from the sculptors Alberto Giacometti and Henry Moore, both of whom Bacon greatly admired; he often corresponded and met with Giacometti.Giacometti had employed the device in "The Nose" (1947) and "The Cage" (1950), while Moore used similar frames in his 1952 bronze "Maquette for King and Queen".Bacon's use of frames suggests imprisonment to many critics.