And yet this may be wrong about the body. But about the mind (and there you have the inner person) there is one thing certain, not a theory but a fact--that people change completely. Like a child's slate, the mind is, on which a thousand things are written. The young take so much for granted; the old know. And gallantly they write this for a fact, that for a falsehood. But day by day they live and learn, as the old saw goes. And simple equations become quadratic. And the writing on the slate is altered month by month, as new factors of life are realized. All is a correction, a readjustment. This is gradual, but occasionally, very occasionally, by some mental or spiritual cataclysm all on the slate is sponged clear. And a new and startling departure takes its place. As we see in the inner personality of Anna Janssen the change from the petty arithmetic of Broadway, the venal crooked sums of Sinister Street, to the gigantic calculus of life as the Lord God conceived it, when He formed man of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul.... The district attorney turned from his last witness to the twelve men in the box. "Gentlemen," he said, in the manner of a workman well satisfied with the progress of the job in hand, "I have proved the crime and proved the perpetrator, the circumstances, the setting, the motive. There is but one more thing to be done to clinch this case home like a nail in a horse's shoe. It is now ten years between the time this murder was committed and the bringing of the prisoner to the bar of justice. There is but one more thing to do to remove the smallest iota of doubt that the prisoner at the bar and Anna Janssen, Alastair de Vries's mistress, are one and the same person. And to prove this I shall call to the witness-stand the detective who arrested Anna Janssen in Tahiti, and in whose custody the prisoner has been from that day until she was brought to justice here--a period of nine years and four months in all." "Officer Thomas McCarthy!" "Officer Thomas McCarthy to the stand."