"After a few moments, the creatures came rushing back--first one, then another. Their pushcarts were full of stones, sand, chunks of rubbery plants, and such rubbish as that. They droned out their friendly greeting, which didn't really sound so friendly, and dashed on. The third one I assumed to be my first acquaintance and I decided to have another chat with him. I stepped into his path again and waited. "Up he came, booming out his 'We are v-r-r-riends' and stopped. I looked at him; four or five of his eyes looke…