The young man’s interest and amusement deepened. He put Susan down on her feet. “Might I look at your map?” he asked.

“Willingly,” said Sargon. He unrolled the map on the table and put his finger on London. “We are here,” he said.

“Exactly,” said the young man, helping to hold the map on the table from which it seemed likely to slip.

“It is still the most convenient centre in the world,” said Sargon.

“For almost any purpose,” said the young man.

“For mine, yes,” said Sargon.

“And that star thing—that must be a great help?”

“It is,” said Sargon.

“I suppose you would—work in the room? It would be just yourself? There would be no coming and going of people?”

“None. While I was here, no one would know me. Afterwards perhaps. But that does not concern us. Here I should remain incognito.”