moment. He evidently saw through Quarles's reticence, and knew that the
professor would not speak before him.

"It will be evening before we reach Whiteladies," Quarles went on,
"because there is an important inquiry we must make in London first."

"Very well," said Sir Michael. "I will delay until to-morrow night."

"There can be no harm in that," Cayley said. "We are given forty-eight
hours. I should like to do the scoundrels, but I cannot forget that
revenge may be as much a motive as money."

"I am not losing sight of that fact," said Quarles, "but I have little
doubt it is the money."

As we drove back to Chelsea the professor was silent, but when we were in
the empty room he began to talk quickly.

"I am puzzled, Wigan. Before we went out I was saying some one was out
for money, and the letter Sir Michael has received proves it. We were
engaged upon a negative argument, and I should have gone on to show why
it was unlikely Cayley had had anything to do with the affair. I confess
that his sudden appearance to-night tends to knock holes in the argument
I should have used. He comes from Paris, the money is to be paid to the
Credit Lyonnais, Paris. He is keen that the money should be paid, had
evidently been persuading Sir Michael that it ought to be paid. This
tends to confuse me, and I cannot forget Zena's remark about the girl's
age and that this is not an ordinary kidnaping case. If Cayley had met
her on the terrace she would naturally stroll away with him if he asked
her to do so. At a safe distance from the house he, and a confederate,