ay. After you told me, over the telephone,
that you feared I might have been followed, I looked up the taxi driver
who took me uptown, and asked him if anyone had tried to question him. I
thought that possibly this hotel might have been watched, and, if so,
the person who was watching it might have noticed the number of my car,
or the driver, and later, applied to him for information. I saw him as
soon as I returned. No one had done so."

"That is all very well, but they might have asked him, and found out
where he drove you, later."

"They did ask him, later. Why is it, Richard, that you seem to forget
that I have done detective work before, too? I suspected that he might
be approached, and I subsidized him--gave him ten dollars, and
instructed him to let me know, in case anyone questioned him about me.

"Well, late yesterday afternoon, a woman, answering the description you
give, did apply to the cabman to find out where he had driven me.
Naturally he told her nothing. Then, thinking, I suppose, that I might
repeat my visit, she gave him five dollars, and told him to let her know
in case I drove from here to any other hotel. She figured, no doubt,
that being your wife, I was certain to go and see you."

Duvall sat forward in his chair, an eager look upon his face.

"You did splendidly, Grace," he said. "Much better than I have done. But
the important point is this. How was the cabman to let her know, and
where? Did she give him her name and address?"

"She gave him a name and address. It is about that, that I wanted to see
you."

"What was it?"

"Alice Watson. General Delivery. He was to write her a letter."

Duvall sank back in his chair with a disappointed look.

"An assumed name, of course," he said. "I'm afraid it won't be of much
service to us."

"But why? I was going to write this woman a letter, giving her the name
of some other hotel--any one would do. Then, she would come there to
find you, we could have the cabman, Leary, on watch to point her out,
and in that way identify her and perhaps follow her to her home." Duvall
shook his head.

"It would have worked splendidly, my dear," he said, "except for the
fact that in some way the woman has already discovered the name of my
hotel. She will not go to the general delivery window at the post office
to get it, now, for she already knows it. And if she did, she would
realize as soon as she read your letter that you were not telling her
the truth. Is