By the mid-1970s, piles of limbs and shoes, as featured in Monument, had become leitmotifs in his work. (tate.org.uk)
He was known to render certain themes several times over, which repeat themselves as leitmotifs throughout his body of work. (widewalls.ch)
Indeed, the sweeping leitmotif for this work would appear that searing maverick - conscience of society, often located, in Igbo Nollywood movies, in some lowly drunkard, or even a lunatic — a societal nobody, that nevertheless exposes, with relish, the folly of the high - and - mighty! (nigeriapoliticsonline.com)