From a New Yorker online article review:
Beneath his smooth, genial, almost inhumanly productive and evasive surface, there were turbulent waters. His very name, for all its air of Ivy League ease, represents a burdened legacy. The Porters were his difficult, scapegrace father’s family; the Coles were his mother’s rich and ambitious Indiana family. He was a Porter by birth but, if his mother had anything to do with it, would be a Cole for life.
Certainly, Porter’s ghost could not ask for better care than he has been given in “The Letters of Cole Porter” (Yale), edited by Cliff Eisen, a professor of music history at King’s College London, and Dominic McHugh, a musicologist at the University of Sheffield (and the editor of Alan Jay Lerner’s letters). Laid out with a meticulous scholarly apparatus, as though this were the correspondence of Grover Cleveland, every turn in the songwriter’s story is deep-dived for exact chronology, and every name casually dropped by Porter gets a worried, explicatory footnote.