I am a high school student working through Lillian Lieber's The Einstein Theory of Relativity. In the introduction to the ether, it is assumed that the ether would not move with the Earth. Although Lieber does cite one book (Understanding Relativity, Sartori), presumably including the several known "facts" that she mentions, I do not have access to a large public library and thus to this book. Could someone explain why the ether does not move with the Earth (in the nineteenth century ether model)? If that were not the case, wouldn't there be a "deflection" in the path of light travelling at any angle to the "ether wind" anyway? Or would light naturally behave like a swimmer?