Edited by Dan Hodges on 8/8/2015, 9:47 pm
Extensive discussion of the film (and Florey and Chaplin's longstanding prior personal friendship and its absolute crack-up during the filming) runs from pp. 279-289.
Florey directed but Chaplin insisted on "a technique" and much else. For example, Chaplin "also tried, unsuccessfully, to convince the Directors Guild to allow him to place [the name of the assistant director, Wheeler Dryden, whom Chaplin despised and who was also the child of "one of his early dubious marriages"] on the same card as Florey's. For the French advertising, Chaplin utterly violated the agreement, listing Florey as only assistant director with Dryden. Chaplin further ordered that no publicity be given to Florey's work on the picture. Although many friends urged Florey to sue Chaplin to correct the billing, he preferred not to. The two never saw or spoke to one another after the last day of shooting in early September."
Taves has a lot of inside information, which indicates an extremely troubled set, as you can see from just the one quote I've provided.