But Professor Lloyd breaks down their "trapping mechanisms" into six categories pitfalls, lobster pots, snares, flypaper or birdlime traps, steel traps and mousetraps.
As a reaction against the sunny hues of impressionism, the cubists had often painted with what looked like birdlime and various fine shades of mud.
Tables, people, pipes and wine bottles were all reduced to barely decipherable fragments, each seen from a different angle and painted in various shades of birdlime and mud.