Firmly convinced of this man's guilt, I was determined he should not marry Olivia. The crime had been committed for her sake, and, seeing that he had behaved in so cowardly a fashion, it was a fit retribution that he should not achieve his purpose. It was no use my warning Olivia as to the true character of Felix, as she firmly believed him to be Francis, and would decline to believe my story. Under these circumstances I judged it advisable to see Felix at his chambers, and warn him that I knew all. Terrified by the predicament in which he found himself, he might leave England, and thus Olivia would be saved from lifelong misery. His punishment for the crime would occur later on; as, notwithstanding his flight, he could be arrested on the Continent while extradition treaties were in force.

After dinner I therefore went to call on Felix. His rooms were in Jermyn Street, and, as mine were just round the corner in Duke Street, I had not far to go. My visit was paid on the chance of finding him in, as I did not wish to put him on his guard by notifying my wish for an interview. As the twins, in spite of constant disagreement, occupied the same rooms, I could not but wonder at the nerve of Felix in coming back to the apartments where every familiar object would remind him of his fratricidal act.

It was just eight o'clock when I reached the door of the chambers. At the foot of the stairs I found the caretaker ensconced in a glass box like an insect. To him I addressed myself. He was an old friend of mine, and rather an oddity in his way.

"Is Mr. Briarfield within?"

"Mr. Francis Briarfield is in his rooms," said the caretaker; "but Mr. Felix is in Paris."

Of course I guessed that this would be the answer, and secretly admired the dexterity with which Felix had carried out his plans. Doubtless in the end when his brother did not return, or rather when his pretended self did not reappear, he would account for it by an accident in the Eastern deserts. However, my business was with Felix, alias Francis, so I made no comment on the caretaker's remark.

"Pray take up my card to Mr. Briarfield," I said. "I want to see him at once."

"I can't take it up now, sir," said the caretaker civilly. "Mr. Briarfield is engaged, and gave particular orders that he was not to be disturbed."

"Ah! but doubtless he is engaged with a friend of mine," I hinted ambiguously.

"Is the lady a friend of yours, sir?"