Here are excerpts from a fascinating article, “A Lost Sky Record: The Vanished 1910 Halley’s Comet Engraving of Cueva del Indio, Puerto Rico,” by Ángel M. Nieves-Rivera, Madeliz Gutiérrez-Ortiz, and Ángel A. Acosta-Colón, published in the August edition of NSS News: American Caving Magazine (Vol. The 1910 passage of Halley’s Comet generated intense public interest and, in many places, fear. These textual sources provide a local observational context for interpreting material traces that may represent imagery of the 1910 comet. Southern Puerto Rico Cave GraffitiInterdisciplinary documentation also records a figurative graffiti element depicting a comet-like form positioned above a tomb-like motif. Taken together, these elements support a working interpretation of both motifs as historic responses dating to the 1910 apparition.