Figure 1. David’s collection of Rubik’s Cubes. Image: Colin Wright
Figure 2. David Singmaster. Reproduced here with the permission of Lucas Garron
Figure 3. Left to right: John Railing, John Conway, Richard Guy, David Singmaster. Image: Colin Wright
Figure 4. Motif of the Three Hares on a ceiling boss in the early sixteenth-century Eglise d'Anjeux. Ti'Michel, CC BY-SA 4.0. https://creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons
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