DEAR SIR,--I believe that in almost every case gold mines that are worked occur in loose soil, sand and gravel, where the gold is in grains, and has been washed out of the rocks. Such is the case in the Uralian Mountains and Siberia, where I believe that not one mine is worked in the solid rocks, although some veins are known. I should not, therefore, search for veins in the mountains, but try to find the best spots on the banks of rivers. Success must depend much, indeed, upon chance, though practice doubtless would afford some marks that would be of service. If you should find veins in the rocks, I doubt whether they would be profitable to work. I have a strong suspicion that gold will be found all along the western part of our Continent; perhaps through the whole of California and Oregon; for I suspect that this is the eastern side of a vast gold deposit in Asia, reaching as far west as the Uralian Mountains. If this opinion would increase the gold fever, I think you had better not mention it. It may not prove true. I hope you will improve your health, if not your fortunes, by this voyage. Let your expectations of success in gold-digging be moderate, and then I think the jaunt will do you good. That God’s providence may be over you is the wish and prayer of Yours respectfully and sincerely, EDWARD HITCHCOCK. _Amherst, December 25th, 1848._ P.S.--Magnetic iron sand is an almost invariable attendant of good deposits of gold, and I should not be very sanguine of finding good deposits when this is wanting. _Letter from Geo. F. Dunning, Esq., Clerk in the Mint of the United States._ MINT OF THE UNITED STATES, } _Philadelphia, June 18, 1851_. } DEAR SIR,--In compliance with your request, I proceed to give you some information respecting the Mint establishment, and the terms upon which it receives bullion for coinage. You are doubtless correct in supposing that much misapprehension exists both as to the character of the establishment and the routine of its business. Within the limits of a letter, I can, of course, do little else than notice briefly a few prominent subjects.