I also missed out something; when Rowbotham delivered those lectures, I don't think he was talking about a round earth, because the Zetetic Society was pushing the flat earth model.
So, I wonder if what Rowbotham said about the moon being phosphoric would work with the courses of the moon and the sun over a flat earth.
To be honest, flat-earther's have not presented a convincing model of what they believe earth would look like, nor have they explained the courses of the sun and the moon in a way good enough to debunk the round earthy model.
Well, maybe we are used to the ball, and kinda hard to imagine ourselves standing on anything else!