"But that sunset! I've never seen anything like it in my wildest dreams ... the two suns! It was like mountains of fire boiling into space."
"I've seen it," said Marvin. "It's rubbish."
"We only ever had the one sun at home," persevered Arthur, "I came from a planet called Earth you know."
"I know," said Marvin, "you keep going on about it. It sounds awful."
"Ah no, it was a beautiful place."
"Did it have oceans?"
"Oh yes," said Arthur with a sigh, "great wide rolling blue oceans ..."
"Can't bear oceans," said Marvin.
"Tell me," inquired Arthur, "do you get on well with other robots?"
"Hate them," said Marvin. "Where are you going?"
Arthur couldn't bear any more. He had got up again.
"I think I'll just take another walk," he said.
"Don't blame you," said Marvin and counted five hundred and ninety-seven thousand million sheep before falling asleep again a second later.
Arthur slapped his arms about himself to try and get his circulation a little more enthusiastic about its job. He trudged back up the wall of the crater.
Because the atmosphere was so thin and because there was no moon, nightfall was very rapid and it was by now very dark. Because of this, Arthur practically walked into the old man before he noticed him.