So, I’m a noob but I have enough sense before posting to hesitate, and avoid where possible obvious questions.. and this occasion found the answer just before posting!
I was going to ask..Why is the Herodotus Histories Book1 called Clio?..
so, for the benefit of any other who search and now find an easy answer..
It seems that the Books are simple named after the Muses.. which is a nice touch
Calliope (epic poetry), Clio (history), Euterpe (flutes and lyric poetry), Thalia (comedy and pastoral poetry), Melpomene (tragedy), Terpsichore (dance), Erato (love poetry), Polyhymnia (sacred poetry), and Urania (astronomy).
Now off to read them and see if the books match those topics.
The names of the nine Muses first occur in Hesiod’s Theogony, lines 76ff. The names were simply taken in order from there and given to Herodotus’ books 1 to 9.