of such a 'sanction' (to use a technical expression) to the use of a finger-print did not dawn upon me till after long experience, and even then it became no more than a personal conviction for many years more. The decisiveness of a finger-print is now one of the most powerful aids to Justice. Our possession of it derives from the impression of Kōnāi's hand in 1858. [2] 'Finger-prints' (Macmillan, 1892), p. 26. [3] See Appendix. Of trials with my own fingers the oldest impression I possess was taken in June 1859, when I first began to keep records. I had been transferred to be Magistrate of Arrah, the most north-westerly district of Bengal, where the Mutiny still left work to do which allowed little time for private hobbies; but I took so many prints among the society of the Station, as well as among Indians of all classes, that my 'fad' about them was well known. The Medical Officer of Arrah was Dr. R. F. Hutchinson, who naturally took great interest in the subject. Twenty-one years later, in 1880, he was still there, and sent me a 'repeat' print of his fingers. Here is a facsimile of his first Arrah impression. In 1890, being in England, he visited Galton's Laboratory, and gave a second repeat (after thirty-one years) which was used in 'Finger-prints' (1892), p. 93, to support Mr. Galton's evidence of 'Persistency'. In the facsimile 'Collection 1858-1913', which I am attaching to some of the copies of this narrative, will be found other prints which I took at Arrah of my whole hand and of my right foot. They agree irresistibly with prints taken now after an interval of fifty-seven years. [Illustration: KONAI'S HAND Bengal 1858] [Illustration: Contract for 2,000 maunds of road-metalling, between W. J. Herschel and Rajyadhar Konai, in Konai's handwriting]