This is the text present in Chapter 11 of H.G. Wells's The Time Machine as serialized in the New Review. It was cut from the book but later published on its own as a short story, "The Grey Man."
A simple test of whether something is only incidentally sci-fi, or not sci-fi at all despite being in a sci-fi setting, is whether the story could take place in a known society without changing its message.
First Contact, Alien Invasions and Wars, Colonization, Alien Biologies/ Environments, Whole Planet As An Alien Entity, Alien Anthropology -- Cultures, Communication with Aliens, Allien Buddies/ Police, Sex With Or Among Aliens, Criticism on Aliens