He had seen Luzanne several times, and though he did not believe in her, he knew the marriage certificate was real.

He had no credence in Carnac's lack of honour, yet it was strange he had not fought his wife, if his case was a good one.
Day by day he had felt Carnac's power growing, and he feared his triumph unless some sensation stopped it.

Well, he had at hand the sufficient sensation.

He would produce both the certificate of marriage and the French girl who was the legal wife of Carnac Grier.

That Luzanne was French helped greatly, for it would be used by Carnac's foes as an insult to French Canada, and his pulses throbbed as he thought of the possible turmoil in the constituency.
Fortunately the girl was handsome, had ability, and spoke English with a French accent, and she was powerful for his purposes.