We already knew by then that the speed of light was finite (per Wikipedia, in 1676), but not that it was constant (general relativity). I don't think there'd h

We already knew by then that the speed of light was finite (per Wikipedia, in 1676), but not that it was constant (general relativity). I don't think there'd have been any reason to think it would act differently than any other small object passing near a more massive one?