remarks he made in the concluding section of [@Coolidge1931]. There he describes various systems of plane curves that remain invariant under finite groups of Cremona transformations. In this connection, he called attention to a paper by Anders Wiman and wrote: “In many cases there is much to be gained by reverting to the method of mapping the plane on an auxiliary cubic surface that we developed …to prove Clebsch’s transformation theorem …. The problem then becomes one of finding groups of collineations of a three-dimensional space which leave a certain cubic surface invariant” [@Coolidge1931 498]. The paper Coolidge cited, [@Wiman1896], appeared just two years after Noether’s report and was published, appropriately enough, in Clebsch’s journal, [*Mathematische Annalen*]{}.

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