We entertained vips from Earth, some high in Authority. They traveled easier underground route; I suppose Warden had warned them. But even on that route is one thirty-kilometer stretch by rolligon. We had one visitor from Earth who looked like trouble, a Dr. Dorian, physicist and engineer. Lorry tipped over—silly driver tried shortcut—they were not in line-of-sight for anything and their beacon was smashed. Poor Dr. Dorian spent seventy-two hours in an unsealed pumice igloo and had to be returned to L-City ill from hypoxia and overdose of radiation despite efforts on his behalf by two Party members driving him.