On page 271 (one third of the way from the bottom of the page) of the Afterword, I mention the sculptor Rinus Roelofs with respect to Anton Hanegraaf's models. I had been told that Rinus had "embarked on a project to animate many of Anton's models."
A decade later, in the column "The Mathematical Tourist" entitled "A Bike Tour for Rinus Roelofs' Art in Twente, the Netherlands", pages 60-65, volume 39, number 1, year 2017, of "The Mathematical Intelligencer", Dirk Huylebrouck discusses a number of Roelofs' statues.
Also we can see a photograph of one Roelofs' own artworks.
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Last updated April 27, 2020.