There was no telegraphic communication with the village which was near his farm. She could only write to him, and she did write to him, by that day's post--having reasons of her own for anxiety, which forbade her to show her letter to Dennis. Well aware of the devoted friendship which united Lord Harry and Arthur Mountjoy--and bearing in mind the newspaper report of the Irish lord's rash association with the Invincibles--her fears now identified the noble vagabond as the writer of the anonymous letters, which had so seriously excited her godfather's doubts of his own safety.

When Sir Giles returned, and took her with him to his house, he spoke of his consultation with the Sergeant in terms which increased her dread of what might happen in the future. She was a dull and silent guest, during the interval that elapsed before it would be possible to receive Arthur's reply. The day arrived--and the post brought no relief to her anxieties. The next day passed without a letter. On the morning of the fourth day, Sir Giles rose later than usual. His correspondence was sent to him from the office, at breakfast-time. After opening one of the letters, he dispatched a messenger in hot haste to the police.

"Look at that," he said, handing the letter to Iris. "Does the assassin take me for a fool?"

She read the lines that follow:

"Unforeseen events force me, Sir Giles, to run a serious risk. I must speak to you, and it must not be by daylight. My one hope of safety is in darkness. Meet me at the first milestone, on the road to Garvan, when the moon sets at ten o'clock to-night. No need to mention your name. The password is: Fidelity."

"Do you mean to go?" Iris asked.

"Do I mean to be murdered!" Sir Giles broke out. "My dear child, do pray try to think before you speak. The Sergeant will represent me, of course."

"And take the man prisoner?" Iris added.

"Certainly!"

With that startling reply, the banker hurried away to receive the police in another room. Iris dropped into the nearest chair. The turn that the affair had now taken filled her with unutterable dismay.

Sir Giles came back, after no very long absence, composed and smiling. The course of proceeding had been settled to his complete satisfaction.

Dressed in private clothes, the Sergeant was to go to the milestone at the appointed time, representing the banker in the darkness, and giving the password. He was to be followed by two of his men who would wait in concealment, within hearing of his whistle, if their services were required. "I want to see the ruffian when he is safely handcuffed," Sir Giles explained; "and I have arranged to wait for the police, to-night, at my office."

There was but one desperate way that Iris could now discern of saving the man who had confided in her godfather's honour, and whose trust had already been betrayed. Never had she loved the outlawed Irish lord--the man whom she was forbidden, and rightly forbidden, to marry--as she loved him at that moment. Let the risk be what it might, this resolute woman had determined that the Sergeant should not be the only person who arrived at the milestone, and gave the password. There was one devoted friend to Lord Harry, whom she could always trust--and that friend was herself.

Sir Giles withdrew, to look after his business at the bank. She waited until the clock had struck the servants' dinner hour, and then ascended the stairs to her godfather's dressing-room. Opening his wardrobe, she discovered in one part of it a large Spanish cloak, and, in another part, a high-crowned felt hat which he wore on his country excursions. In the dark, here was disguise enough for her purpose.

As she left the dressing-room, a measure of precaution occurred to her, which she put in action at once. Telling her maid that she had some purchases to make in the town, she went out, and asked her way to Garvan of the first respectable stranger whom she met in the street. Her object was to walk as far as the first milestone, in daylight, so as to be sure of finding it again by night.