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[^1]: Since he taught for many years at Harvard University, Coolidge had ready access to the rich holdings in Widener Library, whose director was his older brother [@Struik1955 670]. So it did not often happen that he could not read a mathematical text firsthand.

[^2]: In his preface, Coolidge wrote: “Large protions of the work are written according to the spirit and methods of the Italian geometers, to whom, indeed, the whole is dedicated \[Ai Geometri Italiani, Morti, Viventi\]. It would be quite impossible to describe the extent of the writer’s obligation to them. Yet behind the Italians stands one whose contributions are even greater, Max Noether” [@Coolidge1931 x].

[^3]: After Noether’s death, Brill 