demanded Harren.

"Captain Harren, you are unmarried and have no son; you have no father,
no brother, no sister. Therefore I infer--several things--for example,
that you are in love."

"I? In love?"

"Desperately, Captain."

"Your inferences seem to satisfy you, at least," said Harren almost
sullenly, "but they don't satisfy me--clever as they appear to be."

"_Ex_actly. Then you are _not_ in love?"

"I don't know whether I am or not."

"I do," said the Tracer of Lost Persons.

"Then you know more than I," retorted Harren sharply.

"But that is my business--to know more than you do," returned Mr. Keen
patiently. "Else why are you here to consult me?" And as Harren made no
reply: "I have seen thousands and thousands of people in love. I have
reduced the superficial muscular phenomena and facial symptomatic aspect
of such people to an exact science founded upon a schedule approximating
the Bertillon system of records. And," he added, smiling, "out of the
twenty-seven known vocal variations your voice betrays twenty-five
unmistakable symptoms; and out of the sixteen reflex muscular symptoms
your face has furnished six, your hands three, your limbs and feet six.