way of Harwich. He blamed
himself that in his eagerness to discover the stranger with the satchel
he had not thought to look for Seltz.

Upon the conclusion of his deliberations, Duvall crossed over to the
other side of the boat, where he had left Dufrenne. The little old
Frenchman stood gazing down at the sea, his face blue with cold, and
filled with a look of bitter disappointment. He did not even glance up,
as Duvall joined him.

"Come, Monsieur Dufrenne," the detective said, kindly. "Let us go
below."

The old man accompanied him without a word. As they reached the
companionway, however, he spoke. "We must return to London at once," he
said. "This same boat will take us back to Harwich."

"Yes," Duvall agreed, "unless we discover that Seltz is aboard."

"Seltz?" The Frenchman looked up, puzzled, yet with an expression of
renewed hope in his eyes.

"Yes. We have apparently followed the wrong man. In that case, why not
search for the right one. If Seltz is on board, we will follow him to
Brussels. If not, we will return to London. We can make sure, when the
passengers are discharged at Antwerp."

Dufrenne nodded eagerly. "It may indeed be possible," he remarked, as
they entered the saloon.

Most of the passengers were on deck when the steamer reached her wharf
at Antwerp, but in spite of a careful search, Duvall was unable to
locate Seltz amongst them. He stood by the gang plank, watching the
crowd as it left the boat, his eyes searching restlessly for the swarthy
countenance of the barber. He had almost given up hope, when he saw a
belated passenger hurriedly cross the deck and dart up the gang plank.
He moved rapidly, his throat muffled in a blue neckcloth, his slouch hat
pulled down over his eyes, but the glance which Duvall obtained of his
somewhat scared face told him at once that he had located his man.

He signaled quietly to Dufrenne, who had been standing discreetly in the
background for fear the barber might recognize him, and the two left the
boat together, some forty or more yards in Seltz's rear.

They did not make any attempt to follow him closely. There seemed no
room for doubt that he was bound for the train to Brussels, and Duvall
and his companion followed along at a leisurely pace, showing nothing of
the agitation they so keenly felt.

They purposely avoided any attempt to enter the same compartment with
the barber, being satisfied when they saw him climb aboard the train.
They did, h