“Yes.  Every move you make is being keenly watched by spies.”

“Our enemies must be well-disguised and keep well under cover.”

“You haven’t thus far detected them, have you?”

“No,” admitted Old King Brady.

“Then that shows how secure they are.  A number of times they have been as close to you as I am.  Yet you did not know it.  By this you can realize how easy it would be for them to attack you unexpectedly, kill you, and escape.”

“Even that thought won’t scare me off the case.”

“You are very obstinate and persevering.”

“Those two elements will yet make me win this fight.”

“Foolish man.  Don’t delude yourself.  Your enemies are very powerful people.  They will beat you in the end.”

“I don’t agree with your idea.”

“Is my warning in vain?”

“Entirely so.”

The veiled woman sighed and bowed her head in thought.  Finally she strode away, saying in impatient tones: 

“Very well.  Since I can’t dissuade you from your set purpose, I shall not bother myself any further about the matter.”

She seemed to be very angry at the old detective.

He strode after her.

“Wait a moment longer!” he exclaimed.

“No.  I have no more to say,” she replied, sharply.  “Don’t attempt to follow me.  If you do, it will be as much as your life is worth.”

“Humbug!” he replied.

“So you doubt me, eh?  Well, look behind you.”

He glanced over his shoulder and caught view of the shadowy figures of several men lurking about the trees lining the street.

Old King Brady was astonished.

She evidently had a body-guard of watchful men.

“Who are those people?” he demanded.

“My friends,” she replied, quietly.  “If they saw you attack or follow me, they would put a sudden end to your career at long range.”

“By firing?”

“Yes.”

“Let me walk as far as the corner with you.”

“Very well, Mr. Brady.  I have no objection to that.”

The journey was made in utter silence, and the old detective noticed that the shadowy men were following them.

When they reached the corner, Old King Brady glanced around, looking for
Harry, who agreed to meet him there.

The boy was nowhere in sight.

Old King Brady then coughed and dropped his handkerchief as a signal.

For a moment there was no notice paid to it, but presently he heard a distant hissing sound of singular penetration.

It was an answer to his signal and meant that he was seen and understood.

With a satisfied feeling the old detective now said to the veiled woman: 

“I shall leave you here.  Don’t think I am ungrateful for your kindness.  On the contrary, I appreciate it very much.  But my duty compels me to pay no heed to your valuable warning.  I must run down my quarry.  Good-night, madam.”