On a bed, Mank dictates his script to Rita, who is sitting infront of him. Then he takes up a swatter, he takes casual aim at a housefly. He asks her to fetch a cup of tea, so she gets up to get their tea. She returns with cups and asks him about Marion Davies:
Rita: What's she like?
Mank: Why is it when you scratch a prim, starchy English schoolgirl, you get a swooning moving-picture fan who has forgotten all she ever learned about the Battle of Hastings?
Rita: Hastings. 14 October 1066, ten centigrade.
Why did Mank ask such question here?