en at the end, near the head of
the tunnel--which, by the way, could be used as a means of entrance
and exit at low tide. All the electric power came through the meter of
Kan-Suh Concessions."

"I see," said Dunbar, reflectively, glancing at his watch; "in a word,
we know everything except"...

"What's that?" said Sowerby, looking up.

"The identity of Mr. King!" replied the inspector, reaching for his hat
which lay upon the table.

Sowerby replaced his book in his pocket.

"I wonder if any of the bodies will ever come ashore?" he said.

"God knows!" rapped Dunbar; "we can't even guess how many were aboard.
You might as well come along, Sowerby, I've just heard from Dr.
Cumberly. Mrs. Leroux"...

"Dead?"

"Dying," replied the inspector; "expected to go at any moment. But the
doctor tells me that she may--it's just possible--recover consciousness
before the end; and there's a bare chance"...

"I see," said Sowerby eagerly; "of course she must know!"

The two hastened to Palace Mansions. Despite the lateness of the hour,
Whitehall was thronged with vehicles, and all the glitter and noise of
midnight London surrounded them.

"It only seems like yesterday evening," said Dunbar, as they mounted the
stair of Palace Mansions, "that I came here to take charge of the case.
Damme! it's been the most exciting I've ever handled, and it's certainly
the most disappointing."

"It is indeed," said Sowerby, gloomily, pressing the bell-button at the
side of Henry Leroux's door.

The door was opened by Garnham; and these two, fresh from the noise and
bustle of London's streets, stepped into the hushed atmosphere of the
flat where already a Visitant, unseen but potent, was arrived, and now
was beckoning, shadowlike, to Mira Leroux.

"Will you please sit down and wait," said Garnham, placing chairs for
the two Scotland Yard men in the dining-room.

"Who's inside?" whispered Dunbar, with that note of awe in his voice
which such a scene always produces; and he nodded in the direction of
the lobby.

"Mr. Leroux, sir," replied the man, "the nurse, Miss Cumberly, Dr.
Cumberly and Miss Ryland"...

"No one else?" asked the detective sharply.

"And Mr. Gaston Max," added the man. "You'll find whisky and cigars upon
the table there, sir."

He left the room. Dunbar glanced across at Sowerby, his tufted brows
raised, and a wry smile upon his face.

"In at the death, Sowerby!" he said grimly, and lifted the stopper from
the