Explore "Key Out of Time" by Andre Norton on Textopian. Read with annotations and highlights.
Another map spread out and this time pinned down with small stones on beach gravel.
"Here, here, and here -- " Ashe's finger indicated the points marked in a pattern which flared out from three sides of Finger Island. Each marked a set of three undersea depressions in perfect alliance with the land which, according to the galactic map, had once been a cape on a much larger land mass. Though the Terrans had found the ruins, if those saucers in the sea could be so termed, the remains had no meaning for the explorers.