"What's the matter?" he gasped.

"Listen," said Hanaud.

At the bottom of Duke Street, by Charing Cross Station, the newsboy was shouting his wares. Both men listened, and now the words came to them mispronounced but decipherable.

"Mysterious crime at the Semiramis Hotel."

Ricardo stared at his companion.

"You were wrong then!" he cried. "Calladine's story was true."

For once in a way Hanaud was quite disconcerted.

"I don't know yet," he said. "We will buy a paper."

But before he could move a step a taxi-cab turned into the Adelphi from the Strand, and wheeling in front of their faces, stopped at Calladine's door. From the cab a girl descended.

"Let us go back," said Hanaud.