Complex sentence: H. S. M. Coxeter reported that the shape of the central chameleon cage in "Stars" had previously been described in 1900 by Max Brückner, whose book "Vielecke und Vielflache" includes a photograph of a model of the same shape.
Split into simpler sentences: H. S. M. Coxeter reported that the shape of the central chameleon cage in "Stars" had previously been described in 1900 by Max Brückner. Brückner's publication includes a photograph of a model of the same shape.