I never saw her again.

I never shall." Kerns looked long and unsteadily upon his friend; then very gravely fumbled in his pocket and drew forth the business card of Westrel Keen, Tracer of Lost Persons.
"That," he said, "will be about all." And he bestowed the card upon Harren with magnificent condescension.
And about five o'clock the following afternoon Harren found the card among various effects of his, scattered over his dresser.
It took him several days to make up his mind to pay any attention to the card or the suggestion it contained.

He scarcely considered it seriously even when, passing along Fifth Avenue one sunny afternoon, he chanced to glance up and see the sign KEEN & CO.
TRACERS OF LOST PERSONS staring him in the face.
He continued his stroll, but that evening, upon mere impulse, he sat down and wrote a letter to Mr.Keen.
The next morning's mail brought a reply and an appointment for an interview on Wednesday week.

Harren tossed the letter aside, satisfied to let the matter go, because his leave expired on Tuesday, and the appointment was impossible.
On Sunday, however, the melancholy of the deserted club affected his spirits.

A curious desire to see this Tracer of Lost Persons seized him with a persistence unaccountable.