That kind of boy could not remain for long a typist in the office of a discerning man like Louis. Perhaps certain idiosyncrasies of spelling and a certain originality of execution on the machine helped bring about a change of duties. But chiefly it was because of a better reason. This reason was made especially clear by an incident connected with an important mining case in which Janin was serving as expert for the side represented by Judge Curtis Lindley, famous mining lawyer of San Francisco. The papers which indicated the line of argument which Judge Lindley and Mr. Janin were intending to follow came to Hoover's desk to be copied. As he wrote he read with interest. The mine was in the Grass Valley region that he knew so well. He not only copied but he remembered and thought. The result was that when the typewriter boy delivered the papers to the mining engineer they were accompanied by the casual statement that the great expert and the learned attorney were all wrong in the line of procedure they were preparing to take! And he proceeded to explain why, first to Mr. Janin's indignant surprise but next to his great interest, because the explanation involved the elucidation of certain geologic facts not yet published to the world, which the typewriter boy had himself helped to discover during his work in the Grass Valley region. The outcome was that Janin and his new boy went around together to Judge Lindley's office where after due deliberation the line of argument was altered. The further result was that the boy parted from his typewriter, first to begin acting as assistant to various older staff men on trips to various parts of the Coast for mine examinations, then to make minor examinations alone, and finally to handle bigger ones. The letters from the young mining engineer to the girl of the geology department, still at Stanford, came now in swift succession from Nevada, Wyoming, and Idaho, and then very soon after from Arizona and New Mexico. Little mines did not require much time for examination and reports signed "Hoover" came into Janin's office with bewildering rapidity. Janin liked these reports; they not only showed geological and mining knowledge, but they showed a shrewd business sense. The reporter seemed never to lose the perspective of cost and organization possibilities in relation to the probable mineral richness of the prospects. And the reports said everything they had to say in very few and very clear words. Herbert Hoover was not only moving fast; he was learning fast, and he was rising fast in Janin's estimation. He had a regular salary or guarantee now with a certain percentage of all the fees collected by Janin's office from the properties he examined. What he was earning now I do not know, but we may be sure it was considerably more than the forty-five dollars a month which he had begun with as typewriter boy, a few months before.