Thanks for the link, Chuck. I have never seen the Dottori pictures before.
Coincidentally, I was talking yesterday about an exhibition I went to in about 1956. I remember a Wyndham Lewis or two but cannot remember where it was or who the other painters were. What I do remember is a series of drawings and paintings? pastels? which were explained to me as including the trace that would be made by a spot on a moving bicycle wheel. I have never forgotten them and I occasionally across similar 'traces' in school maths or physics books. Who were they bu? Anybody else remember them?