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Published online by Cambridge University Press: 20 November 2018
In a recent paper [7] Longuet-Higgins and Parry prove that, given a general Clifford configuration of degree 5 (abbreviated to CL5), C 0 say, there exist points P and Q such that the inverses of P in the circles of C 0 form the points of another CL5C 1, whilst the inverses of Q in the circles of C 1 are the points of C 0; also the inverses of Q in the circles of C 0 form the points of a CL5 C –1, whilst the inverses of P in the circles of C –1 are the points of C 0. This leads to an infinite chain …, C –2, C –1, C 0, C 1, C 2, … of CL5s, each connected to the next by means of the same two points P and Q, called the poles of the chain.