The next few definitions in John’s unfinished dictionary contain a couple of curious items. I knew “limiting point” as a term in geometry, but hadn’t heard of it applied to the speed of light. And while I’d read descriptions of aliens with long fingers, I wasn’t familiar with it as a “generic term.”
POSTSCRIPT: I’ve just learned that Archives for the Unexplained have posted many of John’s articles for Saga here. A feast for Keel fans!