Before Rowbotham came along and did Bedford Level Experiment, why wasn't there any serious flat Earther doing a serious flat Earth research?
Ever since Aristotle provided his 3 proof of a spherical Earth, most just abandon flat Earth idea, surely someone before Rowbotham could have done some sort of (serious) experiment to led the conclusion of a flat Earth. And by serious, i don't mean experiment like look at the ground, people in the south fall off and stuff like that.