"Maybe so," the Explorer said slowly. "Yes, I guess you're right. But I still feel a horrible wistfulness about them, and I hug to myself the hope that a few of them escaped and set up a colony on some planet we haven't yet visited." There was a long silence. Then the Explorer turned back. "You old devil," he said in a manner that showed his gayer and more boisterous mood had returned, though diminished, "you still haven't told me anything definite about them." "So I haven't," replied the Archeologist with guileful innocence. "Well, they were vertebrates." "Oh?" "Yes. What's more, they were mammals." * * * * * "Mammals? I was expecting something different." "I thought you were." The Explorer shifted. "All this matter of evolutionary categories is pretty cut-and-dried. Even a knowledge of how they looked doesn't mean much. I'd like to approach them in a more intimate way. How did they think of themselves? What did they call themselves? I know the word won't mean anything to me, but it will give me a feeling--of recognition." "I can't say the word," the Archeologist told him, "because I haven't the proper vocal equipment. But I know enough of their script to be able to write it for you as they would have written it. Incidentally, it is one of those words common to all their languages, that they attributed to an earlier race of beings." The Archeologist extended one of his eight tentacles toward the blackboard. The suckers at its tip firmly grasped a bit of orange crayon. Another of his tentacles took up the spectacles and adjusted them over his three-inch protruding pupils. The eel-like glittering pet drifted back into the room and nosed curiously about the crayon as it traced: RAT End of the Project Gutenberg EBook of Later Than You Think, by Fritz Leiber