A careless landing of a flying saucer cost the alien navigator a stern warning, and the earthlings a broken section of the road. It’s good that the cosmic conscience did not allow the aliens to leave everything as it was. And Korneliy Udalov, as the head of the repair and construction office, helped in repairing the road. I established, so to speak, personal connections. The first story of the Guslyar cycle. According to the author's apocrypha, the first version of the story was written and first published in Bulgaria in the Bulgarian language in 1967, and in 1969 translated by the author into Russian from the Bulgarian edition. In fact, the story “Indisputable Proof” was simply written on the same plot, and there is no Great Guslar in the story.