This isn’t a Greek Language question, but related.
The nine books of Herodotus’ Histories were named after the nine muses sometime after his death. Does anyone know which book corresponds with which muse? I haven’t had any luck finding an answer.
From the Oxford Classical Dictionary
“The clumsy division of the work into nine “Muses” is some librarian’s fancy: Herodotus himself cross-refers to this or that λόγος”
However the O Dict. of Classical Literature ventures that it could have been Alexandrian editors.
That’s all I can see without further research, sorry.