"There is some truth in that," admitted the doctor, looking puzzled. "I suppose he must have kept that fact from her so far, as I don't see what possible explanation he could give her."

"Always assuming she is in love with him," said I musingly.

"Oh, as to that, I am certain it is so. A woman like Rose Gernon, drawing a good salary, would not mix herself up in such a dangerous business merely for money. There is a stronger motive, and that is love. I'll lay anything," continued Merrick, in sporting phrase--"I'll lay anything that she is madly in love with the fellow."

"Well, and Olivia, thinking Felix is Francis, loves him madly also. If these two women come together, there will be trouble for Felix."

"Eureka!" cried the doctor, jumping up excitedly, "the very thing. When thieves fall out--you know the adage. Let us bring the two women together, and see the upshot."

"There will simply be a row," said I; "what is the use of that?"

"This," retorted Merrick sharply: "that when Rose finds she has been betrayed she will reveal all the mystery out of revenge and assure Olivia that Felix is not Francis."

"That's not a bad idea, Merrick! Also it might occur that Olivia reveals something in her turn."

"Impossible! She can't possibly know the man's villainy, else she would not think of marrying him."

"I suppose not, and yet," I added reflectively, "I wouldn't be surprised if she were cognizant of Felix's movements on the 10th and 11th. She certainly stuck up for him in the most amazing manner at the first interview."