basic method I’ve since often explained and which is essentially the same as Bertini’s: I view the plane as the image of a cubic surface and then project the curve carried onto the surface back again into a plane, etc. etc.
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> In any case, I wrote or spoke to you about this once. If you, as I suspect, wish to add a note to Bertini’s article, perhaps you could take the opportunity to say a word about this as well.[^7]

Noether was out of town when Klein’s letter arrived, but on returning to Erlangen he wrote back in an agitated state of mind. At first, he could not believe that Klein had actually written to him about this matter long ago, and that neither of them had ever spoken about it since. After looking through Klein’s letters from late 1869, however, he found that this was, indeed, the case. At that time, Klein had been studying in Berlin along with his new-found Norwegian friend, Sophus Lie, while Noether was working under Clebsch in Göttingen. During the fall vacation, Clebsch visited Berlin for a few days, during which time he and Kronecker discussed methods for desingularizing an algebraic curve. 