The Time Traveller and his companion Weena are in, what he perceives to be, a museum. Weena, who had been rolling a sea urchin down the sloping glass of a case, presently came, as I stared about me, and very quietly took my hand and stood beside me. (The Time Machine – H. G. Wells) What is Weena doing with this sea urchin? I'm assuming that the "glass of a case" is one of those things. If so, could you perhaps paraphrase what she is doing? Is she moving the glass case about so that the sea urchin also moves around in the case? Thanks.