They took a taxi at the station and were speeding toward the house of Ashton-Kirk, when Fuller spoke again.

"Several times," said he, "I have heard you say that you know who killed Dr. Morse. I suppose that to-day will see the arrest of the murderer."

Ashton-Kirk nodded.

"Yes," said he, "I suppose so."

The driver of the cab was paid and dismissed and the two entered the house.

"Any one here, Stumph?" asked Ashton-Kirk.

"Mr. O'Neill and Mr. Purvis," replied the man.

These two were seated in a room off the secret agent's study, engaged in conversation.

"How is this?" demanded Ashton-Kirk, rather sharply. "I thought that either one or the other of you was to remain at the Fordham Road place until I called you off."

"Well, seeing that the regular police are there," said O'Neill, "we thought we could ease up a bit."