William George Hooper is an author about whom relatively little is publicly known; no reliable records confirm his nationality, dates of birth and death, or educational background. What can be established is that he wrote Aether and Gravitation, the single work by him held in this collection. Judging from its title and subject, the book discusses the ether hypothesis and the problem of gravitation, placing it at the intersection of physics and natural philosophy. It reflects the sustained interest of scholars in the medium of light propagation and the mechanism of gravity during the transition of scientific thought in the late nineteenth and early twentieth centuries. Its style favors conceptual analysis and theoretical reasoning, typical of popular scientific writing of that era. Because sources are scarce, this note relies only on verifiable authorship and title information and makes no biographical inferences.