first passer-by, and he forgot that when he entered it he had handed
his card to the servant. That piece of paper may yet send him to the
gallows. In the meantime, he has disappeared completely, and
somewhere, in one of the millions of streets of this great capital,
in a locked and empty house, lies the body of his brother, and of the
woman his brother loved, undiscovered, unburied; and with their
murder unavenged."

In the discussion which followed the conclusion of the story of the
Naval Attache, the gentleman with the pearl took no part. Instead, he
arose, and, beckoning a servant to a far corner of the room,
whispered earnestly to him until a sudden movement on the part of Sir
Andrew caused him to return hurriedly to the table.

"There are several points in Mr. Sears's story I want explained," he
cried. "Be seated, Sir Andrew," he begged. "Let us have the opinion
of an expert. I do not care what the police think, I want to know
what you think."

But Sir Andrew rose reluctantly from his chair.

"I should like nothing better than to discuss this," he said. "But it
is most important that I proceed to the House. I should have been
there some time ago." He turned toward the servant and directed him
to call a hansom.

The gentleman with the pearl stud looked appealingly at the Naval
Attache. "There are surely many details that you have not told us,"
he urged. "Some you have forgotten."